Alternating magnetic field losses in high-Tc superconducting multifilament tapes with a mixed matrix of Ag and BaZrO3

被引:47
作者
Kwasnitza, K [1 ]
Clerc, S
Flukiger, R
Huang, YB
机构
[1] Paul Scherrer Inst, CH-5232 Villigen, Switzerland
[2] Univ Geneva, CH-1211 Geneva, Switzerland
来源
PHYSICA C | 1998年 / 299卷 / 1-2期
关键词
AC losses; Bi-2223 high-Tc superconducting multifilament tapes; Ag-BaZrO3 mixed matrix;
D O I
10.1016/S0921-4534(98)00076-8
中图分类号
O59 [应用物理学];
学科分类号
摘要
Alternating magnetic field losses for the new (Bi, Pb)(2)Sr2Ca2Cu3O10 multifilament tapes with a mixed Ag-BaZrO3 matrix for coupling loss reduction have been measured at 77 K and at frequencies up to 100 I-It. Due to the presence of oxide barriers around the filaments, the effective transverse electrical resistivity in the matrix is increased by a factor of eight, with a corresponding modification of the frequency dependence of the coupling losses. This result is a very promising step in the development of low loss high-T-c superconductors for 50 Hz applications. For larger Delta B values, it seems feasible to reduce the coupling losses at 50 Hz to a tolerable level by both, applying high-resistive barriers and changing the conductor dimensions, away from the extremely flat tape geometry. A saturation loss criterion is derived for twisted flat multifilament tapes. (C) 1998 Elsevier Science B.V.
引用
收藏
页码:113 / 124
页数:12
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