Influence of DC external magnetic field on AC transport current loss of HTS tape

被引:18
作者
Miyagi, D
Tsukamoto, O
Amemiya, N
Mukai, H
Fujikami, J
Hayashi, K
Sato, K
机构
[1] Yokohama Natl Univ, Fac Engn, Hodogaya Ku, Yokohama, Kanagawa 2408501, Japan
[2] Sumitomo Elect Ind Ltd, Kanagawa, Japan
来源
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1998年 / 310卷 / 1-4期
关键词
transport AC loss; magnetic field dependence; E-J characteristics; n value; Bi-2223; tape;
D O I
10.1016/S0921-4534(98)00440-7
中图分类号
O59 [应用物理学];
学科分类号
摘要
We measured the AC transport current loss of Bi 2223 multifilament Ag-sheathed tape under DC external magnetic field of 0-0.2 T. There were discrepancies between the measured data and Norris' formula for elliptical model in the range of low value of I-p/I-c (I-p and I-c are peak of the AC transport current and critical current of the tape respectively), while without DC background field, the loss of the tape was close to Nonis' formula. Theoretically speaking, even with the DC background field and decreased critical current the AC transport current loss of the tape follows Norris' formula which is derived from the Bean model. When DC background field is applied to the HTS tape, n value of the power law E-J characteristics decreases together with the decrease of J(c). Dependence of the AC transport current loss on the n value was analyzed by numerical calculation. The results show that the loss depends on the n value and that decrease of the n value is one of the causes of the discrepancies between the measured data and Nonis' formula. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:90 / 94
页数:5
相关论文
共 3 条
[1]  
CISZEK M, 1997, IEE T APPL SUPERCOND, V7, P1
[2]  
FUKUI S, 1997, CRYOG ENG C INT CRYO