Superconducting bulk magnets:: Very high trapped fields and cracking

被引：148

作者：

Gruss, S ^{[1
]}

Fuchs, G ^{[1
]}

Krabbes, G ^{[1
]}

Verges, P ^{[1
]}

Stöver, G ^{[1
]}

Müller, KH ^{[1
]}

Fink, J ^{[1
]}

Schultz, L ^{[1
]}

机构：

[1] Inst Festkorper & Werkstofforsch Dresden, D-01171 Dresden, Germany

来源：

APPLIED PHYSICS LETTERS | 2001年 / 79卷 / 19期

关键词：

D O I：

10.1063/1.1413502

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Improved trapped fields are reported for bulk melt-textured YBa2Cu3O7-delta (YBCO) material in the temperature range between 20 and 50 K. Trapped fields up to 12.2 T were obtained at 22 K on the surface of single YBCO disks (with Ag and Zn additions). In YBCO minimagnets, maximum trapped fields of 16 T (at 24 K) and of 11,2 T (at 47 K) were achieved using (Zn+Ag) and Zn additions, respectively. In all cases, the YBCO disks were encapsulated in steel tubes in order to reinforce the material against the large tensile stress acting during the magnetizing process and to avoid cracking. We observed cracking not only during the magnetizing process, but also as a consequence of flux jumps due to thermomagnetic instabilities in the temperature range betweeen 20 and 30 K. (C) 2001 American Institute of Physics.

引用

页码：3131 / 3133

页数：3

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