Department of Electrical Engineering and Computer Science
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Publications



Vanderbemden, P. (in press). Characterization of superconductor magnetic properties in crossed magnetic fields. In D., Larbalestier & D., Cardwell (Eds.), Handbook of Superconducting Materials (2nd edition). CRC Press | Taylor & Francis Group.
Peer reviewed
This chapter deals with the characterization of the magnetic properties of superconductors which are subjected to magnetic fields that have been applied along two orthogonal directions, which is commonly ...
Wera, L., Fagnard, J.-F., Kumar, N. D., Shi, Y., Vanderheyden, B., & Vanderbemden, P. (2017). Magnetic Shielding Above 1 T at 20 K With Bulk, Large Grain YBCO Tubes Made by Buffer-aided Top Seeded Melt Growth. IEEE Transactions on Applied Superconductivity, 27(4).
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YBCO tubes of ~ 10 mm diameter closed at one extremity were engineered by a Buffer-Aided Top Seeded Melt Growth fabrication process (BA-TSMG). These tubes can act as efficient “dc” magnetic shields and are ...
Wera, L., Fagnard, J.-F., Kumar, N. D., Shi, Y., Vanderheyden, B., & Vanderbemden, P. (2016, September 07). Magnetic shielding above 1 T at 20 K with bulk, large grain YBCO tubes made by Buffer-aided Top Seeded Melt Growth. Poster session presented at Applied Superconductivity Conference ASC 2016, Denver, USA.
A superconducting tube can be used as an efficient magnetic shield. The best shielding performance levels are usually achieved when the tube is closed at one or both extremities. The purpose of the present ...
Brisbois, J., Motta, M., Avila Osses, J., Shaw, G., Devillers, T., Dempsey, N. M., Veerapandian, S. K. P., Colson, P., Vanderheyden, B., Vanderbemden, P., Ortiz, W. A., Nguyen, N. D., Kramer, R. B. G., & Silhanek, A. (2016). Imprinting superconducting vortex footsteps in a magnetic layer. Scientific Reports, 6, 27159.
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Local polarization of a magnetic layer, a well-known method for storing information, has found its place in numerous applications such as the popular magnetic drawing board toy or the widespread credit cards ...
Brisbois, J., Adami, O.-A., Avila Osses, J., Motta, M., Ortiz, W. A., Nguyen, N. D., Vanderbemden, P., Vanderheyden, B., Kramer, R. B. G., & Silhanek, A. (2016). Magnetic flux penetration in Nb superconducting films with lithographically defined micro-indentations. Physical Review B, 93(5), 054521.
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We present a thorough investigation by magneto-optical imaging of the magnetic flux penetration in Nb thin films with lithographically defined border indentations. We demonstrate that discontinuity lines (d ...
Fagnard, J.-F., Morita, M., Nariki, S., Teshima, H., Caps, H., Vanderheyden, B., & Vanderbemden, P. (2016). Magnetic moment and local magnetic induction of superconducting/ferromagnetic structures subjected to crossed fields: experiments on GdBCO and modelling. Superconductor Science and Technology, 29(12), 125004.
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Recent studies have shown that ferromagnetic materials can be used together with bulk high temperature superconductors in order to improve their magnetic trapped field. Remarkably, it has also been pointed out ...
Philippe, M., Fagnard, J.-F., Wera, L., Morita, M., Nariki, S., Teshima, H., Caps, H., Vanderheyden, B., & Vanderbemden, P. (2016). Influence of crossed fields in structures combining large grain, bulk (RE)BCO superconductors and soft ferromagnetic discs. Journal of Physics: Conference Series, 695, 012003.
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Bulk (RE)BCO superconductors are able to trap record magnetic fields and can be used as powerful permanent magnets in various engineering applications such as rotating machines and magnetic bearings. When ...
Stachowiak, P., Mucha, J., Szewczyk, D., Zhai, Y., Hsu, C. H., Coombs, T. A., Fagnard, J.-F., Philippe, M., & Vanderbemden, P. (2016). Thermal properties of Ti-doped Cu–Zn soft ferrites used as thermally actuated material for magnetizing superconductors. Journal of Physics : D Applied Physics, 49, 125004.
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A great majority of widely used ferrite ceramics exhibit a relatively high temperature of order–disorder phase transition in their magnetic subsystem. For applications related to the magnetization process of ...
Thaljaoui, R., Pękała, M., Fagnard, J.-F., & Vanderbemden, P. (2016). Critical analysis of the paramagnetic to ferromagnetic phase transition in Pr0.55K0.05Sr0.4MnO3. Physica B: Condensed Matter, 482, 8 - 13.
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The critical properties of monovalent doped manganite Pr0.55K0.05Sr0.4MnO3 around the paramagnetic to ferromagnetic phase transition were investigated through various methods: the modified Arrott plots (MAP ...
Vanderbemden, P., Cardwell, D. A., Freyhardt, H. C., & Vanderheyden, B. (2016). Processing and applications of (RE)BCO and MgB2 bulk superconductors: an introduction to the special issue. Superconductor Science and Technology, 29, 060302.
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Preface of the Superconductor Science and Technology special issue "Focus on processing and applications of (RE)BCO and MgB2 bulk superconductors". This special issue focuses on contributions from the 9th ...
Wera, L., Fagnard, J.-F., Hogan, K., Vanderheyden, B., & Vanderbemden, P. (2016). Magnetic Shielding with Bulk High Temperature Superconductors: Improvement of the Shielded Volume in Hollow Cylinders. In M., Muralidhar (Ed.), Superconductivity: Applications Today and Tomorrow (pp. 95-114). New York: Nova Science.
Peer reviewed
The superconducting HTS hollow cylinder has been one of the first geometries to demonstrate its utility as an efficient passive magnetic shield, and particularly for DC magnetic shielding. The shielding ...
Wera, L., Fagnard, J.-F., Hogan, K., Vanderheyden, B., & Vanderbemden, P. (2015, September 09). Design of the superconducting end caps of a tubular magnetic shield. Poster session presented at EUropean Conference on Applied Superconductivity EUCAS 2015.
Shielding a sensitive device against DC or AC stray magnetic fields can be realized very efficiently with high-Tc superconductors. A simple magnetic shield can be obtained with a tube enclosing the device ...
Fagnard, J.-F., Debois, S., Morita, M., Nariki, S., teshima, H., Vanderheyden, B., & Vanderbemden, P. (2015, September). Crossed field effect measured on a GdBCO pellet at various temperatures below 77 K. Paper presented at EUropean Conference on Applied Superconductivity EUCAS 2015, Lyon, France.
In engineering applications, superconducting bulk materials might be subjected to cycles of variable magnetic fields transverse to their trapped field which can cause a significant demagnetization. Up to now ...
Philippe, M., Ainslie, M. D., Wera, L., Fagnard, J.-F., Dennis, A., Shi, Y., Cardwell, D. A., Vanderheyden, B., & Vanderbemden, P. (2015). Influence of soft ferromagnetic sections on the magnetic flux density profile of a large grain, bulk Y-Ba-Cu-O superconductor. Superconductor Science and Technology, 28, 095008.
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Bulk, high temperature superconductors have significant potential for use as powerful permanent magnets in a variety of practical applications due to their ability to trap record magnetic fields. In this paper ...
Fagnard, J.-F., Kirsch, S., Morita, M., Teshima, H., Vanderheyden, B., & Vanderbemden, P. (2015). Measurements on magnetized GdBCO pellets subjected to small transverse ac magnetic fields at very low frequency: Evidence for a slowdown of the magnetization decay. Physica C: Superconductivity, 512, 42-53.
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Due to their ability to trap large magnetic inductions, superconducting bulk materials can be used as powerful permanent magnets. The permanent magnetization of such materials, however, can be significantly ...
Pękała, M., Pękała, K., Drozd, V., Fagnard, J.-F., & Vanderbemden, P. (2015). Effect of nanocrystalline structure on magnetocaloric effect in manganite composites (1/3)La0.7Ca0.3MnO3/(2/3)La0.8Sr0.2MnO3. Journal of Alloys & Compounds, 629, 98-104.
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Poly- and nanocrystalline manganite composites (1/3)La0.7Ca0.3MnO3 and / (2/3)La0.8Sr0.2MnO3 prepared by the sol-gel method are studied by magnetic and transport measurements. The Arrott plots and universal ...
Egan, R., Philippe, M., Wera, L., Fagnard, J.-F., Vanderheyden, B., Dennis, A., Shi, Y., Cardwell, D. A., & Vanderbemden, P. (2015). A flux extraction device to measure the magnetic moment of large samples; application to bulk superconductors. Review of Scientific Instruments, 86(2), 025107.
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We report the design and construction of a flux extraction device to measure the DC magnetic moment of large samples (i.e., several cm3) at cryogenic temperature. The signal is constructed by integrating the ...
Hogan, K., Fagnard, J.-F., Wera, L., Vanderheyden, B., & Vanderbemden, P. (2015). Magnetic shielding of an inhomogenous magnetic field source by a bulk superconducting tube. Superconductor Science and Technology, 28(3), 035011.
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Bulk type-II irreversible superconductors can act as excellent passive magnetic shields, with a strong attenuation of low frequency magnetic fields. Up to now, the performances of superconducting magnetic ...
Claassen, J., Osofsky, M., Namburi, D., & Vanderbemden, P. (2015). Thin film superconducting shields. IEEE Transactions on Applied Superconductivity, 25(3), 7500204.
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To date, magnetic shields utilizing high-temperature superconductor materials mostly comprise bulk materials, usually shaped into a cylinder and then heat treated. We analyze the potential of thin-film ...
Devendra Kumar, N., Closset, R., Wera, L., Cloots, R., Vanderbemden, P., & Vertruyen, B. (2015). Magnetic shielding performances of YBa2Cu3O7−δ -coated silver tubes obtained by electrophoretic deposition. Superconductor Science and Technology, 28, 015007.
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We report a complete procedure to achieve multilayer YBCO thick films by electrophoretic deposition on silver tubes using a suspension of YBCO powder in butanol. With the aim to optimize the magnetic ...
Zou, J., Ainslie, M. D., Fujishiro, H., Bhagurkar, A. G., Naito, T., Babu, N. H., Fagnard, J.-F., Vanderbemden, P., & Yamamoto, A. (2015). Numerical modelling and comparison of MgB 2 bulks fabricated by HIP and infiltration growth. Superconductor Science and Technology, 28(7), 075009.
Peer reviewed
MgB 2 in bulk form shows great promise as trapped field magnets (TFMs) as an alternative to bulk (RE)BCO materials to replace permanent magnets in applications such as rotating machines, magnetic bearings and ...
Wera, L., Fagnard, J.-F., Hogan, K., Vanderheyden, B., & Vanderbemden, P. (2014, August 12). Experimental study of the magnetic shielding performances of a Bi2223 tube closed by a Bi2223 cap. Poster session presented at Applied Superconductivity Conference ASC 2014, Charlotte, NC, USA.
A superconducting tube can be used as an efficient magnetic shield. However, the shielding factor (defined as the ratio between the applied magnetic induction and the magnetic induction measured inside the ...
Philippe, M., Fagnard, J.-F., Kirsch, S., Xu, Z., Dennis, A., Shi, Y., Cardwell, D. A., Vanderheyden, B., & Vanderbemden, P. (2014). Magnetic characterisation of large grain, bulk Y–Ba–Cu–O superconductor–soft ferromagnetic alloy hybrid structures. Physica C: Superconductivity, 502, 20-30.
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Large grain, bulk Y–Ba–Cu–O (YBCO) high temperature superconductors (HTS) have significant potential for use in a variety of practical applications that incorporate powerful quasi-permanent magnets. In the ...
Boutaayamou, M., Lemaire, P., Vanderheyden, B., & Vanderbemden, P. (2014). Design and fabrication of an electrode array sensor for probing the electric potential distribution at the mesoscopic scale in antistatic felts. Measurement Science and Technology, 25, 075903 (9.
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We present an original voltage probe design for measuring the electric potential distribution at the mesoscopic scale (i.e., 1 mm–1 cm) in antistatic felts. The felts are composed of a mixture of non ...
Closset, R., Kumar, D., Wera, L., Dellicour, A., Henrist, C., Boschini, F., Cloots, R., Vanderbemden, P., & Vertruyen, B. (2014). YBa2Cu3O7-δ thick films for magnetic shielding: Electrophoretic deposition from butanol-based suspension. Materials Letters, 119, 154-156.
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Multilayered YBa2Cu3O7-δ (YBCO) thick films were coated on silver substrates by electrophoretic deposition (EPD) followed by heat treatment. A butanol-based YBCO suspension is used instead of the common ...
Thaljaoui, R., Boujelben, W., Pękała, M., Pękała, K., Antonowicz, J., Fagnard, J.-F., Vanderbemden, P., Dąbrowska, S., & Mucha, J. (2014). Structural, magnetic and magneto-transport properties of monovalent doped manganite Pr0.55K0.05Sr0.4MnO3. Journal of Alloys and Compounds, 611(0), 427 - 432.
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Pr0.55K0.05Sr0.4MnO3 sample have been synthesized using the conventional solid state reaction. Rietveld refinements of the X-ray diffraction patterns at room temperature confirm that the sample is single phase ...
Thaljaoui, R., Boujelben, W., Pękała, M., Pękała, K., Fagnard, J.-F., Vanderbemden, P., Donten, M., & Cheikhrouhou, A. (2014). Magnetocaloric effect of monovalent K doped manganites Pr0.6Sr0.4−xKxMnO3 (x=0 to 0.2). Journal of Magnetism and Magnetic Materials, 352(0), 6 - 12.
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Magnetic and magnetocaloric properties are reported for polycrystalline monovalent potassium doped manganites Pr0.6Sr0.4−xKxMnO3 (x=0, 0.05, 0.1, 0.15 and 0.2) crystallized in orthorhombic structure with Pnma ...
Vanderbemden, P., Molenberg, I., Simeonova, P., & Lovchinov, V. (2014). Some features of bulk melt-textured high-temperature superconductors subjected to alternating magnetic fields. Journal of Physics: Conference Series, 558, 012016.
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Monolithic, large grain, (RE)Ba2Cu3O7 high-temperature superconductors (where RE denotes a rare-earth ion) are known to be able to trap fields in excess of several teslas and represent thus an extremely ...
Kirsch, S., Fagnard, J.-F., Vanderbemden, P., & Vanderheyden, B. (2013). Semi-analytical study of AC losses in an infinitely long superconducting cylinder surrounded by a metallic sheath: magnetic field dependent critical current density and generation of harmonics. Superconductor Science and Technology, 26, 115001.
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We study the AC losses in an infinitely long cylinder made of a superconducting core surrounded by a non-magnetic metallic sheath and subjected to an axial magnetic field. The losses are computed by assuming ...
Namburi, D. K., Closset, R., Fagnard, J.-F., Vanderbemden, P., Vertruyen, B., & Cloots, R. (2013, January 30). YBCO superconducting thick films: electrophoretic deposition (EPD) on non-planar silver substrates. Paper presented at SHAPING 5, 5th International conference on Shaping of Advanced Ceramics, Mons, Belgium.
A new formulation of a stable YBa2Cu3O7-δ (YBCO) suspension is proposed in which butanol is preferred to the commonly-used acetone as the suspension medium. Appropriate surfactant has been used to develop the ...
Laurent, P., Fagnard, J.-F., & Vanderbemden, P. (2013). AC Magnetic Measurements on Superconductors: Design of a Device for Magneto-Thermal Measurements. In A., Lay Ekuakille, Advanced Instrument Engineering: Measurement, Calibration, and Design (pp. 208-222). IGI Global.
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This work describes the design and realisation of an apparatus to measure simultaneously the AC magnetic properties and the temperature distribution on the top surface of bulk superconducting samples (up to 32 ...
Marchal, C., Fagnard, J.-F., Shi, Y. H., Cardwell, D. A., Mucha, J., Misiorek, H., Cloots, R., Vertruyen, B., & Vanderbemden, P. (2013). The influence of a grain boundary on the thermal transport properties of bulk, melt-processed Y-Ba-Cu-O. Superconductor Science and Technology, 26, 015006.
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We report the dependence of thermal conductivity, thermoelectric power and electrical resistivity on temperature for a bulk, large grain melt-processed Y-Ba-Cu-O (YBCO) high temperature superconductor (HTS ...
Pękała, M., Wolff-Fabris, F., Fagnard, J.-F., Vanderbemden, P., Mucha, J., Gospodinov, M. M., Lovchinov, V., & Ausloos, M. (2013). Magnetic properties and anisotropy of orthorhombic DyMnO3 single crystal. Journal of Magnetism and Magnetic Materials, 335(0), 46 - 52.
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An orthorhombic DyMnO3 single crystal has been studied in magnetic fields up to 14 T and between 3 K and room temperature. The field dependent ordering temperature of Dy moments is deduced. The paramagnetic ...
Thaljaoui, R., Pękała, K., Pękała, M., Boujelben, W., Szydłowska, J., Fagnard, J.-F., Vanderbemden, P., & Cheikhrouhou, A. (2013). Magnetic susceptibility and electron magnetic resonance study of monovalent potassium doped manganites Pr0.6Sr0.4−xKxMnO3. Journal of Alloys and Compounds, 580(0), 137 - 142.
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The monovalent potassium doped manganites Pr0.6Sr0.4−xKxMnO3 (x = 0.05–0.2) are characterized using the complementary magnetic susceptibility and electron resonance methods. In paramagnetic phase the ...
Wera, L., Fagnard, J.-F., Levin, G. A., Vanderheyden, B., & Vanderbemden, P. (2012). Magnetic shielding with YBCO coated conductors: influence of the geometry on its performances. IEEE Transactions on Applied Superconductivity, 23(3), 8200504.
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A superconducting magnetic shield can be built as a stack of several sections of milled 2G coated conductors. Each section consists of a closed loop where persistent currents can flow and provide a strong ...
Wera, L., Fagnard, J.-F., Levin, G., Vanderheyden, B., & Vanderbemden, P. (2012, October 10). Magnetic shielding with YBCO coated conductors: influence of the geometry on its performances. Poster session presented at Applied Superconductivity Conference ASC2012, Portland, OR, USA.
A superconducting magnetic screen can be built as a stack of several sections of milled 2G coated conductors. Each section consists of a closed loop where persistent currents can flow and provide a strong ...
Fagnard, J.-F., Philippe, M., Vanderheyden, B., & Vanderbemden, P. (2012, October). Non-destructive characterization of DC volume magnetic properties of large, bulk (RE)BCO superconducting samples. Poster session presented at Applied Superconductivity Conference ASC2012, Portland, OR, USA.
The development of large, single grain bulk superconductors by melt processing techniques has generated a need to characterize samples magnetically over large dimensions, exceeding typically 20 mm in diameter ...
Philippe, M., Fagnard, J.-F., Dennis, A., Shi, Y., Cardwell, D. A., Vanderheyden, B., & Vanderbemden, P. (2012, October). Magnetic behaviour of soft ferromagnetic alloys attached to bulk (RE)BCO superconductors. Poster session presented at ASC 2012 : Applied Superconductivity Conference, Portland, OR, USA.
Bulk (RE)BCO materials can be used potentially as powerful permanent magnets. The magnetic field distribution around a bulk HTS magnet, however, is strongly non-uniform (conic profile predicted by the Bean ...
Bhame, S., Fagnard, J.-F., Pekala, M., Vanderbemden, P., & Vertruyen, B. (2012). La0.7Ca0.3MnO3 / Mn3O4 composites: does an insulating secondary phase always enhance the low field magnetoresistance of manganites? Journal of Applied Physics, 111, 063905.
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Composites of magnetoresistive La0.7Ca0.3MnO3 (LCMO) with insulating Mn3O4 are useful as a model system because no foreign cation is introduced in the LCMO phase by interdiffusion during the heat treatment ...
Fagnard, J.-F., Elschner, S., Hobl, A., Bock, J., Vanderheyden, B., & Vanderbemden, P. (2012). Magnetic shielding properties of a superconducting hollow cylinder containing slits: Modelling and experiment. Superconductor Science and Technology, 25(10), 104006.
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This paper deals with the magnetic properties of bulk high temperature superconducting cylinders used as magnetic shields. We investigate, both numerically and experimentally, the magnetic properties of a ...
Pekala, M., Pekala, K., Drozd, V., Staszkiewicz, K., Fagnard, J.-F., & Vanderbemden, P. (2012). Magnetocaloric and transport study of poly- and nanocrystalline composite manganites La0.7Ca0.3MnO3/La0.8Sr0.2MnO3. Journal of Applied Physics, 112, 023906.
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Magnetocaloric and transport properties are reported for novel poly- and nanocrystalline double composite manganites, La0.8Sr0.2MnO3/La0.7Ca0.3MnO3, prepared by the sol-gel method. Magnetic field dependence of ...
Starbov, N., Starbova, K., Vanderbemden, P., Simeonova, P., & Lovchinov, V. (2012). An experimental approach for synthesis of Fe-Al-O multiferroic fibrous material. Journal of Physics: Conference Series, 398, 012050.
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Basic principles of the electro-hydrodynamics are applied for synthesis of solid state Fe-Al-O multi-ferroic fibrous material. For that purpose stable blend spinning solutions comprised of a high molecular ...
Vanderbemden, P., & Lovchinov, V. (2012). Influence of the shielding currents lengthscale and anisotropy effects on the magnetic flux profiles of high-temperature superconductors. Journal of Physics: Conference Series, 398, 012012.
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The so-called "magnetic flux profile" AC inductive technique is a powerful method for determining the critical current density Jc of bulk superconductors. In this work we aim at reporting analytical ...
Boutaayamou, M., Léonard, A., Vanderheyden, B., & Vanderbemden, P. (2011). Study of Conduction Mechanisms in Antistatic Felts at the Mesoscopic Scale. International Symposium on New Frontiers in Fiber Materials Science; Conference Proceedings.
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This work is part of a project that deals with the optimization of the quantity and the nature of conductive fibers in antistatic felts used for filtering and sieving powders. Our research concerns the ...
Lousberg, G., Fagnard, J.-F., Chaud, X., Ausloos, M., Vanderbemden, P., & Vanderheyden, B. (2011). Magnetic properties of drilled bulk high-temperature superconductors filled with a ferromagnetic powder. Superconductor Science and Technology, 24, 035008.
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It is shown that filling the holes of a drilled bulk high-temperature superconductor (HTS) with a soft ferromagnetic powder enhances its trapping properties. The magnetic properties of the trapped field magnet ...
Muguerra, H., Rivas-Murias, B., Traianidis, M., Marchal, C., Vanderbemden, P., Vertruyen, B., Henrist, C., & Cloots, R. (2011). Thermoelectric properties of n-type Ca1-xDyxMn1-yNbyO3-delta compounds (x=0, 0.02, 0.1 and y=0, 0.02) prepared by spray-drying method. Journal Of Alloys And Compounds, 509(29), 7710-7716.
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We report the high temperature thermoelectric properties of Ca1-xDyxMn1-yNbyO3-delta (x = 0, 0.02, 0.1 and y = 0, 0.02) synthesized by spray-drying method. A maximum power factor (PF) value of 2.65 mu WK-2 cm ...
Rivas-Murias, B., Fagnard, J.-F., Vanderbemden, P., Traianidis, M., Henrist, C., Cloots, R., & Vertruyen, B. (2011). Spray drying: An alternative synthesis method for polycationic oxide compounds. Journal Of Physics And Chemistry Of Solids, 72(3), 158-163.
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Synthesis of polycationic compounds by the spray-drying technique is an interesting alternative in the domain of aqueous precursor synthesis methods. Spray drying yields high quality samples with good ...
Turczynski, S., Orlinski, K., Pawlak, D. A., Diduszko, R., Mucha, J., Pekala, M., Fagnard, J.-F., Vanderbemden, P., & Carpenter, M. A. (2011). Czochralski crystal growth, thermal conductivity, and magnetic properties of Pr(x)La(1- x)AlO3, where x = 1, 0.75, 0.55, 0.40, 0. Crystal Growth & Design, 11(4), 1091-1097.
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Crystals of Pr(x)La(1-x)AlO3 solid solution have been grown by the Czochralski method for the first time, to the best of our knowledge. Crystals with high praseodymium concentration tend to grow spirally. The ...
Lousberg, G., Fagnard, J.-F., Ausloos, M., Vanderbemden, P., & Vanderheyden, B. (2010). Numerical Study of the Shielding properties of Macroscopic Hybrid Ferromagnetic/Superconductor Hollow Cylinders. IEEE Transactions on Applied Superconductivity, 20(1), 33.
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We study the magnetic shielding properties of hybrid ferromagnetic/superconductor (F/S) structures consisting of two coaxial cylinders, with one of each material.We use an axisymmetric finite-element model in ...
Fagnard, J.-F., Dirickx, M., Levin, G. A., Barnes, P. N., Vanderheyden, B., & Vanderbemden, P. (2010). Use of second generation coated conductors for efficient shielding of DC magnetic fields. Journal of Applied Physics, 108, 013910.
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This paper reports the results of an experimental investigation of the performance of two types of magnetic screens assembled from YBa2Cu3O7-d (YBCO) coated conductors. Since effective screening of the axial ...
Fagnard, J.-F., Elschner, S., Bock, J., Dirickx, M., Vanderheyden, B., & Vanderbemden, P. (2010). Shielding efficiency and E(J) characteristics measured on large melt cast Bi-2212 hollow cylinders in axial magnetic fields. Superconductor Science and Technology, 23, 095012.
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We show that tubes of melt cast Bi-2212 used as current leads for LTS magnets can also act as efficient magnetic shields. The magnetic screening properties under an axial DC magnetic field are characterized ...
Laurent, P., Fagnard, J.-F., Hari Babu, N., Cardwell, D. A., Vanderheyden, B., & Vanderbemden, P. (2010). Self-heating of bulk high temperature superconductors of finite height subjected to a large alternating magnetic field. Superconductor Science and Technology, 23, 124004.
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In this work we study, both experimentally and numerically, the self-heating of a bulk, large YBCO pellet of aspect ratio (thickness / diameter) ~ 0.4 subjected to a large AC magnetic field. To ensure accurate ...
Lousberg, G. P., Fagnard, J.-F., Ausloos, M., Vanderbemden, P., & Vanderheyden, B. (2010). Modification of the trapped field in bulk HTS as a result of the drilling of a pattern of artificial holes. Journal of Physics: Conference Series, 234, 012023.
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The trapped magnetic field is examined in bulk high-temperature superconductors that are artificially drilled along their c-axis. The influence of the hole pattern on the magnetization is studied and compared ...
Pekala, M., Pekala, K., Drozd, V., Fagnard, J.-F., & Vanderbemden, P. (2010). Magnetocaloric effect in La0.75Sr0.25MnO3 manganite. Journal of Magnetism & Magnetic Materials, 322(21), 3460-3463.
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The polycrystalline manganite La0.75Sr0.25MnO3 prepared by an alternative carbonate precipitation route reveals the rhombohedral perovskite structure. Magnetization isotherms measured up to 2 T are used to ...
Pekala, M., Drozd, V., Fagnard, J.-F., & Vanderbemden, P. (2010). Magnetocaloric effect in nano- and polycrystalline manganites La0.5Ca0.5MnO3. Journal of Alloys & Compounds, 507, 350-355.
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Structure, magnetic and magnetocaloric properties of poly- and nanocrystalline La0.5Ca0.5MnO3 manganites prepared by the citrate sol–gel method are studied in a broad temperature range. The Arrott plots show ...
Pietnoczka, A., Pekala, M., Bacewicz, R., Drozd, V., Fagnard, J.-F., Vanderbemden, P., Antonowicz, J., & Zalewski, W. (2010). Local Structure of Mn in (La1-xHox)2/3Ca1/3MnO3 Studied by X-ray Absorption Fine Structure. Acta Physica Polonica A, 117(2), 257-261.
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Results of X-ray absorption fine structure measurements in manganites (La1-xHox)2/3Ca1/3MnO3 with 0.15 < x < 0.50 are presented. When LaMnO3 is doped with a divalent element such as Ca2+, substituting forLa3 ...
Vanderbemden, P., Laurent, P., Fagnard, J.-F., Ausloos, M., Hari Babu, N., & Cardwell, D. A. (2010). Magneto-thermal phenomena in bulk high temperature superconductors subjected to applied AC magnetic fields. Superconductor Science and Technology, 23, 075006.
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In the present work we study, both theoretically and experimentally, the temperature increase in a bulk high temperature superconductor subjected to applied AC magnetic fields of large amplitude. We ...
Vanderbemden, P., Rivas-Murias, B., Lovchinov, V., & Vertruyen, B. (2010). Measurement of dielectric properties at low temperatures: application to the study of magnetoresistive manganite/ insulating oxide bulk composites. Journal of Physics: Conference Series, 253, 012006.
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In this paper, we report low temperature dielectric measurements of bulk composite electroceramic samples containing a colossal magnetoresistive (CMR) manganite phase (La0.7Ca0.3MnO3 [abbreviated LCMO]) and ...
Lousberg, G., Fagnard, J.-F., Haanappel, E., Chaud, X., Ausloos, M., Vanderheyden, B., & Vanderbemden, P. (2009, December). Pulsed-field magnetization of drilled bulk high-temperature superconductors: flux front propagation in the volume and on the surface. Superconductor Science and Technology, (22), 125026.
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We present a method for characterizing the propagation of the magnetic flux in an artificially drilled bulk high-temperature superconductor (HTS) during pulsed-field magnetization. As the magnetic pulse ...
Fagnard, J.-F., Dirickx, M., Ausloos, M., Lousberg, G., Vanderheyden, B., & Vanderbemden, P. (2009). Magnetic shielding properties of high- Tc superconducting hollow cylinders: model combining experimental data for axial and transverse magnetic field configurations. Superconductor Science and Technology, 22(10), 105002 (10.
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Magnetic shielding efficiency was measured on high- Tc superconducting hollow cylinders subjected to either an axial or a transverse magnetic field in a large range of field sweep rates, dBapp/dt. The ...
Fagnard, J.-F., Denis, S., Lousberg, G., Dirickx, M., Ausloos, M., Vanderheyden, B., & Vanderbemden, P. (2009). DC and AC Shielding Properties of Bulk High-Tc Superconducting Tubes. IEEE Transactions on Applied Superconductivity, 19(3), 2905-2908.
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We have studied numerically and experimentally the magnetic flux penetration in high-Tc superconducting tube subjected to a uniform magnetic field parallel to its long axis. This study is carried in view of ...
Lousberg, G., Ausloos, M., Geuzaine, C., Dular, P., Vanderbemden, P., & Vanderheyden, B. (2009). Numerical simulation of the magnetization of high-temperature superconductors: a 3D finite element method using a single time-step iteration. Superconductor Science and Technology, 22, 055005.
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In this paper, we report progress towards a 3D finite element model for the magnetization of a high-temperature superconductor (HTS): we suggest a method that takes into account a power law conductivity and ...
Lousberg, G., Fagnard, J.-F., Noudem, J. G., Ausloos, M., Vanderheyden, B., & Vanderbemden, P. (2009). Measurement of the magnetic field inside the holes of a drilled bulk high-Tc superconductor. Superconductor Science and Technology, 22, 045009.
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We use macroscopic holes drilled in a bulk YBCO superconductor to probe its magnetic properties in the volume of the sample. The sample is subjected to an AC magnetic flux with a density ranging from 30 to ...
Lay-Ekuakille, A., Vendramin, G., Trotta, A., & Vanderbemden, P. (2009). STFT-based spectral analysis of urban waterworks leakage detection. XIX IMEKO World Congress Proceedings (pp. 2172-2176).
Peer reviewed
Water is an essential good for human being necessity. It must be protected against pollution and useless leakage. Urban waterworks is a strategic infrastructure to be managed with particular attention and ...
Mucha, J., Vertruyen, B., Misiorek, H., Ausloos, M., Durczewski, K., & Vanderbemden, P. (2009). Influence of microstructure on the thermal conductivity of magnetoresistive La0.7Ca0.3MnO3/Mn3O4 manganite/insulating oxide polycrystalline bulk composites. Journal of Applied Physics, 105(6), 063501.
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We report the temperature dependence of the thermal conductivity kappa(T) of bulk polycrystalline composite samples containing a magnetoresistive manganite (La0.7Ca0.3MnO3) and an electrically insulating phase ...
Pekala, M., Drozd, V., Fagnard, J.-F., Vanderbemden, P., & Ausloos, M. (2009). Magneto transport characterization of the Sn-doped TbMnO3 manganites. Journal of Alloys & Compounds, 467(1-2), 35 - 40.
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The structural, magnetic and electrical transport properties of the Sn-doped TbMnO3 manganites are studied by X-ray diffraction, ac susceptibility, dc magnetization and electrical resistivity measurements. The ...
Pekala, M., Drozd, V., Fagnard, J.-F., Vanderbemden, P., & Ausloos, M. (2009). Magnetotransport of La0.5Ba0.5MnO3. Journal of Applied Physics, 105(1), 013923-013923-8.
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Physical properties of polycrystalline La0.5Ba0.5MnO3 are reported from low temperature (10 K) up to above room temperature. An aim has been to obtain microscopic parameters and to search for the ...
Radulov, I., Lovchinov, V., Dimitrov, D., Simeonova, P., & Vanderbemden, P. (2009). Magnetic and transport properties of HoMnO3 monocrystals. Journal of Optoelectronics and Advanced Materials [= JOAM], 11, 1553-1556.
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This paper presents results from measurements of the magnetization, specific heat and dielectric constant, and their temperature and magnetic field dependence, for HoMnO3 single crystals. The results are ...
Vanderbemden, P., Vertruyen, B., Ausloos, M., Rivas-Murias, B., & Lovchinov, V. (2009). Grain boundary effects in bulk colossal magneto resistive (CMR) manganites and manganite/insulator composites: electrical and magnetic properties. Journal of Optoelectronics and Advanced Materials [= JOAM], 11(9), 1115-1121.
Peer reviewed
In the first part of this paper, we discuss the effects of grain boundaries on the properties of bulk colossal magnetoresistive (CMR) manganites We compare the electrical resistivity and AC magnetic ...
Fagnard, J.-F., Denis, S., Lousberg, G., Ausloos, M., Vanderheyden, B., & Vanderbemden, P. (2008, August). DC and AC shielding properties of bulk high-Tc superconducting tubes. Poster session presented at Applied Superconductivity Conference ASC2008, Chicago, IL.
In this work we have studied numerically and experimentally the magnetic flux penetration in high-Tc superconducting tube subjected to a uniform magnetic field parallel to its long axis. This study is carried ...
Lousberg, G., Ausloos, M., Vanderbemden, P., & Vanderheyden, B. (2008). Bulk high-Tc superconductors with drilled holes: how to arrange the holes to maximize the trapped magnetic flux? Superconductor Science and Technology, 21, 025010.
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Drilling holes in a bulk high-Tc superconductor enhances the oxygen annealing and the heat exchange with the cooling liquid. However, drilling holes also reduces the amount of magnetic flux that can be ...
Pekala, M., Drozd, V., Fagnard, J.-F., Vanderbemden, P., & Ausloos, M. (2008). Magnetocaloric effect in nano- and polycrystalline manganite La0.7Ca0.3MnO3. Applied Physics A : Materials Science & Processing, 90(2), 237-241.
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La0.7Ca0.3MnO3 samples were prepared in nano- and polycrystalline forms by the sol-gel and solid state reaction methods, respectively, and structurally characterized by synchrotron X-ray diffraction. The ...
Hong, Z., Vanderbemden, P., Pei, R., Jiang, Y., Campbell, A. M., & Coombs, T. A. (2008). The Numerical Modeling and Measurement of Demagnetization Effect in Bulk YBCO Superconductors Subjected to Transverse Field. IEEE Transactions on Applied Superconductivity, 18(2), 1561-1564.
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In this paper, the crossed field demagnetization effect of the bulk type-II superconducting materials in a variety of external magnetic field condition has been investigated both numerically and ...
Laurent, P., Fagnard, J.-F., Vanderheyden, B., Hari Babu, N., Cardwell, D. A., Ausloos, M., & Vanderbemden, P. (2008). An ac susceptometer for the characterization of large, bulk superconducting samples. Measurement Science & Technology, 19(8), 085705.
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The main purpose of this work was to design, develop and construct a simple, low-cost ac susceptometer to measure large, bulk superconducting samples (up to 32 mm in diameter) in the temperature range 78–120 ...
Vanderbemden, P. (2007, October 01). Advances in magnetic materials for magnetic sensors. Paper presented at Research seminar, Dept of Innovation Engineering Faculty of Engineering, University of Salento, Lecce, Italia.
Magnetic materials are used in various engineering applications, including magnetic sensors. In particular, magnetoresistors (i.e. magnetic field dependent resistors) become increasingly popular. This talk ...
Vanderbemden, P., Hong, Z., Coombs, T. A., Ausloos, M., Babu, N. H., Cardwell, D. A., & Campbell, A. M. (2007). Remagnetization of bulk high-temperature superconductors subjected to crossed and rotating magnetic fields. Superconductor Science and Technology, 20(9 Sp. Iss. SI), 174-S183.
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Bulk melt-processed Y-Ba-Cu-O (YBCO) has significant potential for a variety of high-field permanent-magnet-like applications, such as the rotor of a brushless motor. When used in rotating devices of this kind ...
Vertruyen, B., Cloots, R., Ausloos, M., Fagnard, J.-F., & Vanderbemden, P. (2007). Unusual resistivity hysteresis in a bulk magnetoresistive ferromagnetic/ferrimagnetic composite (La0.7Ca0.3MnO3/Mn3O4): Role of demagnetization effects. Applied Physics Letters, 91(6), 062514.
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The authors report an intriguing resistivity versus magnetic field dependence in polycrystalline composite samples containing a magnetoresistive manganite (ferromagnetic/conducting La0.7Ca0.3MnO3) and a ...
Laurent, P., Vanderbemden, P., Meslin, S., Noudem, J. G., Mathieu, J.-P., Cloots, R., & Ausloos, M. (2007). Measurements of thermal effects in a bulk YBCO single domain superconductor submitted to a variable magnetic field. IEEE Transactions on Applied Superconductivity, 17(2, Part 3), 3036-3039.
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When YBCO single domains are subjected to a variable magnetic field, the motion of vortices may give rise to a significant temperature increase and a degradation of the superconducting properties. We have ...
Fabris, F. W., Pekala, M., Drozd, V., Fagnard, J.-F., Vanderbemden, P., Liu, R. S., & Ausloos, M. (2007). Magnetocaloric effect and magnetic properties of Tb0.9Sn0.1MnO3. Journal of Applied Physics, 101(10), 103904.
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The magnetocaloric effect in magnetic materials is of great interest nowadays. In this article we present an investigation about the magnetic properties near the magnetic transition in a polycrystalline sample ...
Denis, S., Dirickx, M., Vanderbemden, P., Ausloos, M., & Vanderheyden, B. (2007). Field penetration into hard type-II superconducting tubes: effects of a cap, a non-superconducting joint, and non-uniform superconducting properties. Superconductor Science and Technology, 20(5), 418-427.
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Using the numerical method of Brandt (1998 Phys. Rev. B 58 6506), we study the penetration of a uniform magnetic field that is gradually applied parallel to the axis of finite type-II superconducting tubular ...
Denis, S., Dusoulier, L., Dirickx, M., Vanderbemden, P., Cloots, R., Ausloos, M., & Vanderheyden, B. (2007). Magnetic shielding properties of high-temperature superconducting tubes subjected to axial fields. Superconductor Science and Technology, 20(3), 192-201.
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We have experimentally studied the magnetic shielding properties of a cylindrical shell of BiPbSrCaCuO subjected to low frequency AC axial magnetic fields. The magnetic response has been investigated as a ...
Dusoulier, L., Denis, S., Dirickx, M., Vanderbemden, P., Ausloos, M., Cloots, R., & Vertruyen, B. (2007). Influence of thermal treatment on YBa2Cu3O7-x thick films prepared by electrophoretic deposition on Ni and Ag substrates. Materials Research Society Symposium Proceedings, 1001E, 1001-M05-03.
Peer reviewed
We have studied the sintering parameters of YBa2Cu3O7-x (YBCO) coatings produced by electrophoretic deposition (EPD) on Ag and Ni substrates. The maximal sintering temperature is ~ 930°C due to partial ...
Lovchinov, V., Apostolov, A., Dimitrov, D., Radulov, I., Simeonova, P., Kalaydjiev, K., & Vanderbemden, P. (2007). Magnetic and transport properties investigation of rare-earth compounds with orthorhombic structures. Journal of Optoelectronics and Advanced Materials [= JOAM], 9(2), 460-463.
Peer reviewed
The structural, magnetic, magnetoelectric, and ferroelectric properties of a series of monocrystals with perovskite structures have been examined. The investigations were carried out in the temperature range 2 ...
Vanderbemden, P., Hong, Z., Coombs, T. A., Denis, S., Ausloos, M., Schwartz, J., Rutel, I. B., Babu, N. H., Cardwell, D. A., & Campbell, A. M. (2007). Behavior of bulk high-temperature superconductors of finite thickness subjected to crossed magnetic fields: Experiment and model. Physical Review. B, 75(17), 174515.
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Crossed-magnetic-field effects on bulk high-temperature superconductors have been studied both experimentally and numerically. The sample geometry investigated involves finite-size effects along both (crossed ...
Vertruyen, B., Cloots, R., Ausloos, M., Fagnard, J.-F., & Vanderbemden, P. (2007). Electrical transport and percolation in magnetoresistive manganite/insulating oxide composites: Case of La0.7Ca0.3MnO3/Mn3O4. Physical Review. B, 75(16), 165112.
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We report the results of electrical resistivity measurements carried out on well-sintered La0.7Ca0.3MnO3/Mn3O4 composite samples with almost constant composition of the magnetoresistive manganite phase (La0 ...
Vertruyen, B., Fagnard, J.-F., Vanderbemden, P., Ausloos, M., Rulmont, A., & Cloots, R. (2007). Electrical transport and magnetic properties of Mn3O4-La0.7Ca0.3MnO3 ceramic composites prepared by a one-step spray-drying technique. Journal of the European Ceramic Society, 27(13-15), 3923-3926.
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La0.7Ca0.3MnO3/Mn3O4 composites can be synthesized in one step by thermal treatment of a spray-dried precursor, instead of mixing pre-synthesized powders. Another advantage of this composite system is that a ...
Krins, N., Hatert, F., Traina, K., Dusoulier, L., Molenberg, I., Fagnard, J.-F., Vanderbemden, P., Rulmont, A., Cloots, R., & Vertruyen, B. (2006). LiMn2-xTixO4 spinel-type compounds (x <= 1): Structural, electrical and magnetic properties. Solid State Ionics, 177(11-12), 1033-1040.
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LiMn2-xTixO4 compounds with 0.5 =<x =< 1 were prepared by solid state reaction and Pechini technique. Powder X-ray diffraction showed that all samples crystallize with the spinel crystal structure (S.G. Fd3m ...
Denis, S., Grenci, G., Dusoulier, L., Cloots, R., Vanderbemden, P., Vanderheyden, B., Dirickx, M., & Ausloos, M. (2006). Characterisation of the magnetic shielding properties of YBaCuO thick films prepared by electrophoretic deposition on silver substrates. Journal of Physics: Conference Series, 43, 509-512.
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This communication reports experimental results on the superconducting properties of YBaCuO thick films prepared by electrophoretic deposition on silver substrates. The magnetic shielding properties of the ...
Dusoulier, L., Denis, S., Fagnard, J.-F., Henrist, C., Vanderheyden, B., Vanderbemden, P., Rulmont, A., Dirickx, M., Ausloos, M., Cloots, R., & Vertruyen, B. (2006). YBa2Cu3O(7-delta) thick films on Ag prepared by the electrophoretic deposition technique. Journal of Physics: Conference Series, 43, 134-137.
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YBa2Cu3O7-δ thick films have been deposited onto Ag substrates by the Electrophoretic Deposition (EPD) technique. Different microstructures and electrical behaviours were observed depending on the starting ...
Dusoulier, L., Denis, S., Nutal, N., Henrist, C., Vanderheyden, B., Vanderbemden, P., Rulmont, A., Dirickx, M., Ausloos, M., Cloots, R., & Vertruyen, B. (2006). Texturation of YBa2Cu3O7-delta thick films by electrophoretic deposition under magnetic field. Key Engineering Materials [=KEM], 314, 153-157.
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YBa2Cu3O7-delta coatings were deposited by electrophoretic deposition (EPD) onto Ni substrates. Particles of different sizes and shapes were used in order to study the influence of the powder microstructure on ...
Dusoulier, L., Denis, S., Vanderbemden, P., Dirickx, M., Ausloos, M., Cloots, R., & Vertruyen, B. (2006). Preparation of YBa2Cu3O7-x superconducting thick films by the electrophoretic deposition method. Journal of Materials Science, 41(24), 8109-8114.
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YBa2Cu3O7-x thick films have been realised by the Electrophoretic Deposition method (EPD). The influence of several parameters (powder and iodine concentrations in the suspension, applied voltage and ...
Fagnard, J.-F., Crate, D., Jamoye, J.-F., Laurent, P., Mattivi, B., Cloots, R., Ausloos, M., Genon, A., & Vanderbemden, P. (2006). Use of a High-Temperature Superconducting Coil for Magnetic Energy Storage. Institute of Physics Conference Series, 43, 829-832.
Peer reviewed
A high temperature superconducting magnetic energy storage device (SMES) has been realised using a 350 m-long BSCCO tape wound as a ''pancake'' coil. The coil is mounted on a cryocooler allowing temperatures ...
Laurent, P., Fagnard, J.-F., Mathieu, J.-P., Meslin, S., Noudem, J. G., Cloots, R., Ausloos, M., & Vanderbemden, P. (2006). Study of thermal effects in bulk RE-BCO superconductors submitted to a variable magnetic field. Journal of Physics: Conference Series, 43, 505-508.
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When bulk RE-BCO superconductors are used as permanent magnets in engineering applications, they are likely to experience transient variations of the applied magnetic field. The resulting vortex motion may ...
Wu, B.-M., Li, B., Zhen, W.-H., Ausloos, M., Du, Y.-L., Fagnard, J.-F., & Vanderbemden, P. (2005). Spin-cluster effect and lattice-deformation-induced Kondo effect, spinglass freezing, and strong phonon scattering in La0.7Ca0.3Mn1-xCrxO3. Journal of Applied Physics, 97(10, Part 1), 103908.
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Besides the Kondo effect observed in dilute magnetic alloys, the Cr-doped perovskite manganate compounds La0.7Ca0.3Mn1-xCrxO3 also exhibit Kondo effect and spin-glass freezing in a certain composition range ...
Kalaydjiev, K., Lovchinov, V., Dimitrov, D., Kirov, M., Baychev, M., Popov, C., Radev, D. D., Marinov, M., Tumbalev, V., Radev, I., & Vanderbemden, P. (2005). Superconducting nanostructured magnesium diboride. Journal of Optoelectronics and Advanced Materials [= JOAM], 7(1), 423-426.
Peer reviewed
Like conventional superconductors, MgB2 is a phonon-mediated superconductor with a relatively long coherence length. Its properties make the prospects for fabricating reproducible uniform Josephson junctions ...
Laurent, P., Mathieu, J.-P., Mattivi, B., Fagnard, J.-F., Meslin, S., Noudem, J. G., Ausloos, M., Cloots, R., & Vanderbemden, P. (2005). Study by Hall probe mapping of the trapped flux modification produced by local heating in YBCOHTS bulks for different surface/volume ratios. Superconductor Science and Technology, 18(8), 1047-1053.
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The aim of this report is to compare the trapped field distribution under a local heating created at the sample edge for different sample morphologies. Hall probe mappings of the magnetic induction trapped in ...
Mathieu, J.-P., Fagnard, J.-F., Laurent, P., Mattivi, B., Henrist, C., Vanderbemden, P., Ausloos, M., & Cloots, R. (2005). Silver paint as a soldering agent for DyBaCuO single-domain welding. Superconductor Science and Technology, 18(4), 508-512.
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Silver paint has been tested as a soldering agent for DyBaCuO 4 single-domain welding. Junctions have been manufactured on Dy-Ba-Cu-O single domains cut either along planes parallel to the c-axis IT or along ...
Mathieu, J.-P., Koutzarova, T., Rulmont, A., Fagnard, J.-F., Laurent, P., Mattivi, B., Vanderbemden, P., Ausloos, M., & Cloots, R. (2005). Investigation of DyBa2CU3O7-d superconducting domains grown by the infiltration technique starting with small size Dy-211 particles. Superconductor Science and Technology, 18(2 Sp. Iss. SI), 136-S141.
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An infiltration and growth process is here used as an alternative to the classical top-seeded melt-textured growth process for the production of Dy-123 single-domains with finely dispersed small size Dy-211 ...
Pekala, M., Mucha, J., Vanderbemden, P., Cloots, R., & Ausloos, M. (2005). Magneto-transport characterization of Dy123 monodomain superconductors. Applied Physics A : Materials Science & Processing, 81(5), 1001-1007.
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We consider textured materials of the DyBa2Cu3O7 type seeded with a Nd123 seed as initiator. They are grown with an excess 20% Dy211 phase on a Dy2O3 substrate. We report chemical characterization, electrical ...
Wu, B. M., Ausloos, M., Du, Y. L., Zheng, W. H., Li, B., Fagnard, J.-F., & Vanderbemden, P. (2005). Spin glass behaviour and spin-dependent scattering in La0.7Ca0.3Mn0.9Cr0.1O3 perovskites. Chinese Physics Letters, 22(3), 686-689.
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The magnetic, electrical and thermal transport properties of the perovskite La0.7Ca0.3Mn0.9Cr0.1O3 have been investigated by measuring dc magnetization, ac susceptibility, the magnetoresistance and thermal ...
Ausloos, M., Pekala, M., Latuch, J., Mucha, J., Vanderbemden, P., Vertruyen, B., & Cloots, R. (2004). Unusual thermoelectric behavior of packed crystalline granular metals. Journal of Applied Physics, 96(12), 7338-7345.
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Loosely packed granular materials are intensively studied nowadays. Electrical and thermal transport properties should reflect the granular structure, as well as intrinsic properties. We have compacted ...
Vertruyen, B., Rulmont, A., Cloots, R., Ausloos, M., Fagnard, J.-F., Dorbolo, S., & Vanderbemden, P. (2004). Effects of silicon addition on the electrical and magnetic properties of copper-doped (La,Ca)MnO3 compounds. Journal of Magnetism and Magnetic Materials, 268(3), 364-373.
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In this paper we report about the electrical properties of La0.7Ca0.3MnO3 compounds substituted by copper on the manganese site and/or deliberately contaminated by SiO2 in the reactant mixture. Several ...
Mathieu, J.-P., Cano, I. G., Koutzarova, T., Rulmont, A., Vanderbemden, P., Dew-Hughes, D., Ausloos, M., & Cloots, R. (2004). The contribution of 211 particles to the mechanical reinforcement mechanism of 123 superconducting single domains. Superconductor Science and Technology, 17(1), 169-174.
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Hardness and fracture toughness of Dy-123 single domains were studied by Vickers in micro-indentation. A significant anisotropy of the mechanical properties was observed. Hardness tests give higher values when ...
Vanderbemden, P., Vertruyen, B., Rulmont, A., Cloots, R., Dhalenne, G., & Ausloos, M. (2003). ac magnetic behavior of large-grain magnetoresistive La0.78Ca0.22Mn0.90Ox materials. Physical Review. B, 68(22), 224418.
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We report a detailed set of ac magnetic measurements carried out on bulk large grain La-Ca-Mn-O samples extracted from a floating zone method-grown rod. Three samples with La0.78Ca0.22Mn0.90Ox stoichiometry ...
Fagnard, J.-F., Vanderbemden, P., Cloots, R., & Ausloos, M. (2003). Anisotropic AC behavior of multifilamentary Bi-2223/Ag tapes. IEEE Transactions on Applied Superconductivity, 13(2, Part 3), 2976-2979.
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In this communication, we report on the anisotropy of the superconducting properties of multifilamentary Bi-based tapes experimentally investigated by AC magnetic susceptibility measurements. The ...
Vanderbemden, P., Dorbolo, S., Hari-Babu, N., Ntatsis, A., Cardwell, D. A., & Campbell, A. M. (2003). Behavior of bulk melt-textured YBCO single domains subjected to crossed magnetic fields. IEEE Transactions on Applied Superconductivity, 13(2, Part 3), 3746-3749.
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We have experimentally investigated the crossed magnetic field effects on bulk melt-processed YBCO single domains. The samples were first permanently magnetized along their c-axis and then subjected to several ...
Mucha, J., Pekala, M., Szydlowska, J., Gadomski, W., Akimitsu, J., Fagnard, J.-F., Vanderbemden, P., Cloots, R., & Ausloos, M. (2003). Magnetotransport study of MgB2 superconductor. Superconductor Science and Technology, 16(10), 1167-1172.
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Precise magnetotransport studies of heat and charge carriers in polycrystalline MgB2 show that magnetic fields up to 8 T remarkably influence electrical resistivity, thermoelectric power and thermal ...
Pekala, M., Mucha, J., Cloots, R., Fagnard, J.-F., Vanderbemden, P., & Ausloos, M. (2003). Magneto-transport study of nb-doped Bi/Pb2223 superconductor. Physica C: Superconductivity, 387(1-2), 191-197.
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The magneto-transport properties of Bi1.5Pb0.4Nb0.1Sr2Ca2Cu3O10-x polycrystalline, superconducting ceramic are reported. The material was found to be chemically homogeneous and partially textured. The mixed ...
Vertruyen, B., Rulmont, A., Cloots, R., Ausloos, M., Dorbolo, S., & Vanderbemden, P. (2002). Synthesis of CMR manganate compounds: the consequences of the choice of a precursor method. Materials Letters, 57(3), 598-603.
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We have studied the electrical transport properties of manganate samples synthesized by different precursor methods. Differences in the synthesis process of the materials can result in samples with similar ...
Fagnard, J.-F., Vanderbemden, P., Crate, D., Misson, V., Ausloos, M., & Cloots, R. (2002). Intragranular and intergranular behaviour of multifilamentary Bi-2223/Ag tapes. Physica C: Superconductivity, 372(Part 2), 970-973.
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This communication aims at reporting the superconducting properties of Bi-2223/Ag tapes determined by using various measuring techniques. First. the original samples have been characterized by electrical ...
Marguillier, D., Cloots, R., Rulmont, A., Fagnard, J.-F., Vanderbemden, P., & Ausloos, M. (2002). YBa2Cu3O7 tapes prepared by sol-gel deposition techniques: microstructure and structural characterizations. Physica C: Superconductivity, 372(Part 2), 715-718.
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We report on the preparation conditions of YBa2Cu3O7 polycrystalline superconducting tapes by a sol-gel deposition technique. We present some discussion on the compatibility between the nature of the substrate ...
Vanderbemden, P., Misson, V., Ausloos, M., & Cloots, R. (2002). Magnetic and transport measurements on melt-textured DyBCO single domains. Physica C: Superconductivity, 372(Part 2), 1225-1228.
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In this communication we report critical current measurements of melt processed DyBa2Cu3O7-x samples determined by several measuring techniques. First the material was characterized by AC susceptibility and DC ...
Vertruyen, B., Cloots, R., Rulmont, A., Dorbolo, S., Vanderbemden, P., & Ausloos, M. (2002). Cu doping as a tool for understanding CMR. Key Engineering Materials [=KEM], 206-2, 1453-1456.
Doping at the Mn-site in CMR manganate-based perovskites has been shown to affect strongly the physical properties of those compounds. We study here the effect of copper substitution in the low doping range on ...
Vanderbemden, P., Ausloos, M., & Cloots, R. (2001). Magnetic properties of melt-textured DyBCO single domains. Materials Research Society Symposium Proceedings, 659, 8.4.1-6.
Peer reviewed
This communication aims at reporting the superconducting properties of several bulk melt-processed DyBa2Cu3O7-x samples determined by using various measuring techniques. The original single domain material was ...
Vanderbemden, P., Bougrine, H., Ausloos, M., & Cloots, R. (2001). Magnetic properties of magnetically textured Bi-2212 ceramics. Physica C: Superconductivity, 351(1), 67-70.
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This paper aims at reporting magnetic properties of bulk polycrystalline Bi2Sr2Ca0.8Dy0.2Cu2O8-y samples textured under a magnetic field. The microstructure of these materials is highly anisotropic and ...
Vertruyen, B., Cloots, R., Rulmont, A., Dhalenne, G., Ausloos, M., & Vanderbemden, P. (2001). Magnetotransport properties of a single grain boundary in a bulk La-Ca-Mn-O material. Journal of Applied Physics, 90(11), 5692-5697.
Peer reviewed (verified by ORBi)
Besides the "intrinsic" colossal magnetoresistance effect observed in single crystals, the polycrystalline manganate compounds also exhibit an "extrinsic" magnetoresistance related to the presence of grain ...
Vertruyen, B., Rulmont, A., Dorbolo, S., Bougrine, H., Vanderbemden, P., Ausloos, M., & Cloots, R. (2000). Two peak effect in GMR : a chemical effect ? Materials Research Society Symposium Proceedings, 602, 269-274.
Peer reviewed
We show that the synthesis conditions have a dramatic influence on the resistivity behavior of calcium and sodium doped LaMnO3. Several samples prepared by lowtemperature techniques exhibit a double-peaked ...
Vanderbemden, P. (1999). Determination of critical current in bulk high temperature superconductors by magnetic flux profile measuring methods. Unpublished doctoral thesis, Université de Liège, ​​Belgium.
In this thesis, the emphasis is placed on determining the critical current density in bulk high-temperature superconductors by magnetic flux profile measuring methods. The thesis involves three different ...
Bradley, A. D., Doyle, R. A., Charalambous, D., Lo, W., Cardwell, D. A., Campbell, A. M., & Vanderbemden, P. (1999). Transport properties of bulk-bicrystal grain boundaries in artificially joined large-grain YBCO. IEEE Transactions on Applied Superconductivity, 9(2), 2038-2041.
Peer reviewed (verified by ORBi)
A technique for joining large-grain YBCO has been used to produce bulk-bicrystal grain boundaries of different orientations. The behaviour of boundaries nominally of 0 degrees[100], 0 degrees[001] and ...
Vanderbemden, P., Cloots, R., Ausloos, M., Doyle, R. A., Bradley, A. D., Lo, W., Cardwell, D. A., & Campbell, A. M. (1999). Intragranular and intergranular superconducting properties of bulk melt-textured YBCO. IEEE Transactions on Applied Superconductivity, 9(2), 2308-2311.
Peer reviewed (verified by ORBi)
We have investigated the superconducting properties of bulk melt-processed YBCO using different experimental techniques. First, single domain materials (i.e. containing no grain boundaries) have been studied ...
Doyle, R. A., Bradley, A. D., Lo, W., Cardwell, D. A., Campbell, A. M., Vanderbemden, P., & Cloots, R. (1998). High field behavior of artificially engineered boundaries in melt-processed YBa2Cu3O7-delta. Applied Physics Letters, 73(1), 117-119.
Peer reviewed (verified by ORBi)
Artificial bulk "zero-angle" boundaries parallel to the c axis have been engineered between large melt-processed YBa2CU3O7-delta (YBCO) grains and observed to carry a transport supercurrent at fields up to at ...
Vanderbemden, P. (1998). Design of an AC susceptometer based on a cryocooler. Cryogenics, 38(8), 839-842.
Peer reviewed (verified by ORBi)
This paper describes a simple and low-cost experimental setup intended for low temperature measurements under a time-dependent magnetic field. A typical application of this system is the determination of A.C ...
Vanderbemden, P., Bougrine, H., Ausloos, M., Auguste, F., & Cloots, R. (1998). AC susceptibility data on Dy2O3 seeded randomly oriented Dy-123 mono domains melt-textured superconductor. Materials Science & Engineering : B, 53(1-2), 198-202.
Peer reviewed (verified by ORBi)
Dy-123 superconducting ceramics have been grows using small Dy2O3 single-crystals as seeds. Randomly oriented large mono-domains have been observed in the vicinity of the seeding single crystal. These domains ...
Vanderbemden, P., Bradley, A. D., Doyle, R. A., Lo, W., Astill, D. M., Cardwell, D. A., & Campbell, A. M. (1998). Superconducting properties of natural and artificial grain boundaries in bulk melt-textured YBCO. Physica C: Superconductivity, 302(4), 257-270.
Peer reviewed (verified by ORBi)
A range of experimental techniques have been used to characterize melt-processed YBa2Cu3O7-d samples containing single-grain boundaries. Both natural high-angle boundaries, which sometimes appear during the ...
Vanderbemden, P., Destombes, C., Cloots, R., & Ausloos, M. (1998). Magnetic flux penetration and creep in BSSCO-2223 composite ceramics. Superconductor Science and Technology, 11(1), 94-100.
Peer reviewed (verified by ORBi)
We have experimentally investigated the magnetic flux penetration through a Bi-2223 polycrystalline superconductor synthesized by a classical solid-state reaction method. Electrical resistance, AC ...
Cloots, R., Dang, A., Vanderbemden, P., Vanderschueren, A., Bougrine, H., Vanderschueren, H., Rulmont, A., & Ausloos, M. (1996). Field percolation and high current density in 80/20 DyBa2Cu3O7-x/Dy2BaCuO5 bulk magnetically textured composite ceramics. Zeitschrift Fur Physik B-Condensed Matter, 100(4), 551-555.
Peer reviewed (verified by ORBi)
We measured the AC susceptibility of magnetically textured (123) 80%/211(20%) DyBaCuO composite in a special set-up in order to enhance the intergrain contribution. The synthesis process led to very clean ...
Lo, W., Dewhurst, C. D., Cardwell, D. A., Vanderbemden, P., Doyle, R. A., & Astill, D. M. (1996). Growth features and intergranular connectivity of melt processed YBCO. Applied Superconductivity, 4(10-11), 507-517.
Peer reviewed
Large grain melt processed Y-Ba-Cu-O (YBCO) samples have been prepared by seeded and unseeded growth techniques. The current carrying ability within individual grains and across grain boundaries has been ...
Stassen, S., Cloots, R., Vanderbemden, P., Godelaine, P. A., Bougrine, H., Rulmont, A., & Ausloos, M. (1996). Magnetic alignment in 2212 Bi-based superconducting system .1. Magnetic orientation of Bi2Sr2Ca1-x(RE)(x)Cu2O8-y [(RE)=Gd, Dy, Ho, Er] powder dispersed in epoxy resin at room temperature. Journal of Materials Research, 11(5), 1082-1085.
Peer reviewed (verified by ORBi)
The magnetic anisotropy of rare-earth substituted 2212 materials (Bi(2)Sr(2)Ca(0.8)RE(0.2)Cu(2)O(x) with RE = Gd, Dy, Ho, Er) is put into evidence. Superconducting powder dispersed in epoxy resin is oriented ...
Stassen, S., Rulmont, A., Vanderbemden, P., Vanderschueren, A., Gabelica, Z., Cloots, R., & Ausloos, M. (1996). Magnetic texturing of bulk samples of the superconductor Bi2Sr2Ca0.8Dy0.2Cu2O8-y. Journal of Applied Physics, 79(1), 553-555.
Peer reviewed (verified by ORBi)
The texturing process of Bi-Sr-Ca(Dy)-Cu-O (2212) is optimized by sintering under a magnetic field. The precursor crystalline powder is melted and grown under a 1.2 T magnetic field. Textured samples are ...
Dang, A., Godelaine, P. A., Vanderbemden, P., Cloots, R., & Ausloos, M. (1995). Intragrain pinning strength depth dependence of 2223-(Bi,Pb)-based high critical Tc ceramics made by a vitreous route. Journal of Applied Physics, 77(7), 3560-3562.
Peer reviewed (verified by ORBi)
Campbell's method for measuring the critical current in superconductors has been used to obtain the critical current density and the pinning strength in Bi1.7Pb0.3Sr2Ca2Cu3O10−y ceramics synthesized by a ...