high-temperature superconductors; magnetic measurements; thermal measurements
Abstract :
[en] 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 experimentally investigated such effects in bulk melt-processed YBCO single domains. Several temperature sensors, a pick-up coil and two Hall probes were placed against the surface of a monolithic bulk YBCO pellet. Data were simultaneously recorded during the application of ac magnetic fields of various amplitudes, either with or without a pre-existing dc trapped flux. The measurement results agree well with to those obtained by numerical modeling. It was also found that a superimposed dc magnetic moment reduces the temperature increase caused by the ac magnetic field. (C) 2003 IEEE.
Research center :
SUPRATECS - Services Universitaires pour la Recherche et les Applications Technologiques de Matériaux Électro-Céramiques, Composites, Supraconducteurs - ULiège
Disciplines :
Electrical & electronics engineering Physics
Author, co-author :
Laurent, Philippe ; Université de Liège - ULiège > Capteurs et systèmes de mesures électriques
Vanderbemden, Philippe ; Université de Liège - ULiège > Capteurs et systèmes de mesures électriques
Fuchs, G., Krabbes, G., Müller, K.-H., Verges, P., Schultz, L., Gonzalez-Arrabal, R., Eisterer, M., Weber, H.W., High magnetic fields in superconducting permanent magnets (2003) J. Low Temp. Phys, 133, pp. 159-180
Hull, J.R., Murakami, M., Applications of bulk high temperature superconductors (2004) Proceedings of the IEEE, Applications of Superconductivity, 92, pp. 1705-1717
Sander, M., Finite element design and magnetization issues of ringshaped cryo-permanent magnets (2006) IEEE Trans. Appl. Supercond, 16, pp. 1158-1561
Matsunga, K., Yamachi, N., Tomita, M., Murakami, M., Koshizuka, N., Characterization of YBCO bulk superconductors for 100 kWh flywheel (2003) Physica C, 392-396, pp. 723-728
Sato, A., Ueda, H., Tsuda, M., Ishiyama, A., Operational, characteristics of linear synchronous actuator with field-cooled HTS bulk secondary (2005) IEEE Trans. Appl. Supercond, 15, pp. 2234-2237
Miki, M., Development of a synchronous motor with, Gd-Ba-Cu-O bulk superconductors as pole-field magnets for propulsion system (2006) Supercond. Sci. Technol, 19, pp. S494-S499
Campbell, A.M., Cardwell, D.A., Bulk high temperature superconductors for magnet applications (1997) Cryogenics, 37, pp. 567-575
McCulloch, M.D., Dew-Hughes, D., Brushless ac machines with high temperature superconducting rotors (1998) Mat. Sci. Engineering B, 53, pp. 211-215
Oswald, B., Best, K.-J., Setzer, M., Soll, M., Gawalek, W., Gutt, A., Kovalev, L., Freyhardt, H.C., Reluctance motors with bulk HTS material (2005) Supercond Sci. Technol, 18, pp. S24-S29
Ohyama, T., Shimizu, H., Tsuda, M., Ishiyama, A., Trapped field characteristics of Y-Ba-Cu-O bulk in time-varying external magnetic field (2001) IEEE Trans. Appl. Supercond, 11, pp. 1988-1991
Laurent, P., Study by Hall probe mapping of the trapped flux modification produced by local heating in YBCO HTS bulks for different surface/volume ratios (2005) Supercond. Sci. Technol, 18, pp. 1047-1053
Fujishiro, H., Yokogama, K., Kaneyama, M., Oka, T., Noto, K., Estimation of generated heat in pulse field magnetizing for SmBaCuO bulk superconductor (2004) Physica C, 414 -414, pp. 646-650
Fujishiro, H., Kawaguchi, S., Kaneyama, M., Fujiwara, A., Tateiwa, T., Oka, T., Heat propagation analysis in HTSC bulks during pulse field magnetization (2006) Supercond. Sci. Technol, 19, pp. S540-S544
Tsukamoto, O., Yamagashi, K., Ogawa, J., Murakami, M., Tomita, M., Mechanism, of decay of trapped magnetic field in HTS bulk caused by application of AC magnetic field (2005) J. Mat. Process. Technol, 161, pp. 52-57
Laurent, P., Study of thermal effects in bulk RE-BCO superconductors submitted to a variable magnetic field (2006) Journal of Physics: Conference Series, 43, pp. 505-508
Mathieu, J.-P., Kano, I.G., Koutzarova, T., Rulmont, A., Vanderbemden, P., Dew-Hughes, D., Ausloos, M., Cloots, R., The contribution of 211 particles to the mechanical reinforcement mechanism of 123 superconducting single domains (2004) Supercond. Sci. Technol, 17, pp. 169-174
Noudem, J.G., Meslin, S., Harnois, C., Chateigner, D., Chaud, X., Melt textured YBa2 Cu3 Oy bulks with artificially patterned holes: A new way of processing c-axis fault current limiter meanders (2004) Supercond. Sci. Technol, 17, pp. 931-936
Vanderbemden, P., Bradley, A.D., Doyle, R.A., Lo, W., Astill, D.M., Cardwell, D.A., Campbell, A.M., Superconducting properties of natural and artificial grain boundaries in bulk melt-textured YBCO (1998) Physica C, 302, pp. 257-270
Vanderbemden, P., Dorbolo, S., Hari-Babu, N., Ntatsis, A., Cardwell, D.A., Campbell, A.M., Behavior of bulk melt-textured YBCO single domains subjected to crossed magnetic fields (2003) IEEE Trans. Appl. Supercond, 13, pp. 3746-3749
Pekala, M., Mucha, J., Vanderbemden, P., Cloots, R., Ausloos, M., Magneto-transport characterization of Dy-123 monodomain superconductors (2005) Applied Physics A, 81, pp. 1001-1007
Mucha, J., Dorbolo, S., Bougrine, H., Durczewski, K., Ausloos, M., Analysis of experimental conditions for simultaneous measurements of transport and magnetotransport coefficients of high temperature superconductors (2004) Cryogenics, 44, pp. 145-149
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