EFFECT OF GRAIN-ALIGNMENT ON THE LEVITATION FORCE OF MELT-PROCESSED YBCO BULK SUPERCONDUCTORS

doi:10.1088/1004-423X/8/7/009

中国物理B ›› 1999, Vol. 8 ›› Issue (7): 533-538.doi: 10.1088/1004-423X/8/7/009

EFFECT OF GRAIN-ALIGNMENT ON THE LEVITATION FORCE OF MELT-PROCESSED YBCO BULK SUPERCONDUCTORS

吴民智¹, 周廉², 冯勇², 张平祥², 吴晓祖², 杨万民³

(1)Institute fur Physikalische Hochtechnologie e. V(IPHT), Jena, Germany; (2)Northwest Institute for Nonferrous Metal Research. P. O. Box 51, Xi'an 710016, China; (3)Northwest Institute for Nonferrous Metal Research. P. O. Box 51, Xi'an 710016, China; Institute fur Physikalische Hochtechnologie e. V(IPHT), Jena, Germany; Department of Materials Science and Engineering, Shenyang 110006, China

收稿日期:1998-11-05 修回日期:1998-12-28 出版日期:1999-07-15 发布日期:1999-07-20

EFFECT OF GRAIN-ALIGNMENT ON THE LEVITATION FORCE OF MELT-PROCESSED YBCO BULK SUPERCONDUCTORS

Yang Wan-min (杨万民)^abc, Zhou Lian (周廉)^a, Feng Yong (冯勇)^a, Zhang Ping-xiang (张平祥)^a, Wu Min-zhi (吴民智)^b, Wu Xiao-zu (吴晓祖)^a, W. Gawalek^a

^a Northwest Institute for Nonferrous Metal Research. P. O. Box 51, Xi'an 710016, China; ^b Institute fur Physikalische Hochtechnologie e. V(IPHT), Jena, Germany; ^c Department of Materials Science and Engineering, Shenyang 110006, China

Received:1998-11-05 Revised:1998-12-28 Online:1999-07-15 Published:1999-07-20

摘要/Abstract

摘要： Single-domain YBCO bulk superconductors have been fabricated by Top Seeded Melt Slow Cooling Growth(TSSCG) process. Two typical YBCO cylinder samples with differential grain-alignment were selected for the investigation of the relationship between the grain-alignment and the levitation force under the same testing condition at liquid nitrogen temperature. It is found that the levitation force values is much different for the two samples, the levitation force of the sample with H∥c-axis is more than two times higher than that of the samples with H⊥c-axis. So it is necessary to take account of this anisotropy in practical applications. The relationship between a magnet and a superconductor can be well described with a double exponential function. All the results are discussed in details.

Abstract: Single-domain YBCO bulk superconductors have been fabricated by Top Seeded Melt Slow Cooling Growth(TSSCG) process. Two typical YBCO cylinder samples with differential grain-alignment were selected for the investigation of the relationship between the grain-alignment and the levitation force under the same testing condition at liquid nitrogen temperature. It is found that the levitation force values is much different for the two samples, the levitation force of the sample with H∥c-axis is more than two times higher than that of the samples with H⊥c-axis. So it is necessary to take account of this anisotropy in practical applications. The relationship between a magnet and a superconductor can be well described with a double exponential function. All the results are discussed in details.

中图分类号:

74.72.Bk

74.25.Ha (Magnetic properties including vortex structures and related phenomena) 74.25.Op (Mixed states, critical fields, and surface sheaths) 81.20.-n (Methods of materials synthesis and materials processing)

杨万民, 周廉, 冯勇, 张平祥, 吴民智, 吴晓祖. EFFECT OF GRAIN-ALIGNMENT ON THE LEVITATION FORCE OF MELT-PROCESSED YBCO BULK SUPERCONDUCTORS[J]. 中国物理B, 1999, 8(7): 533-538.

Yang Wan-min (杨万民), Zhou Lian (周廉), Feng Yong (冯勇), Zhang Ping-xiang (张平祥), Wu Min-zhi (吴民智), Wu Xiao-zu (吴晓祖), W. Gawalek. EFFECT OF GRAIN-ALIGNMENT ON THE LEVITATION FORCE OF MELT-PROCESSED YBCO BULK SUPERCONDUCTORS[J]. Acta Physica Sinica (Overseas Edition), 1999, 8(7): 533-538.

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EFFECT OF GRAIN-ALIGNMENT ON THE LEVITATION FORCE OF MELT-PROCESSED YBCO BULK SUPERCONDUCTORS

EFFECT OF GRAIN-ALIGNMENT ON THE LEVITATION FORCE OF MELT-PROCESSED YBCO BULK SUPERCONDUCTORS

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