Temperature dependence of critical currents and ac transport losses in (Bi, Pb) 2Sr2Ca2Cu3Ox and YBa2Cu3Oy tapes

被引：8

作者：

Zhang, Guo Min ^{[1
]}

Knoll, D. C.

Nguyen, D. N.

Sastry, P. V. P. S. S.

Schwartz, Justin

机构：

[1] Florida State Univ, Ctr Adv Power Syst, Tallahassee, FL 32310 USA

[2] Florida State Univ, Dept Phys, Tallahassee, FL 32310 USA

[3] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

[4] FAMU FSU Coll Engn, Dept Mech Engn, Tallahassee, FL 32310 USA

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2007年 / 20卷 / 06期

关键词：

D O I：

10.1088/0953-2048/20/6/006

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The critical currents and self- field ac losses of YBa2Cu3Oy coated conductors and ( Bi, Pb) 2Sr2Ca2Cu3Ox tapes were measured at several temperatures between 45 K and the respective critical temperature. The temperature dependence of ac losses was measured at 50 Hz using the lock- in method for a transport current. The frequency dependence of ac loss was measured at 55 K for transport current frequencies from 25 to 400 Hz. The results show that variation of ac transport loss as a function of normalized critical current is nearly the same at all temperatures in the measured temperature range for both YBa2Cu3Oy and ( Bi, Pb) 2Sr2Ca2Cu3Ox tapes. The temperature dependence of the loss factor, however, is different for ( Bi, Pb) 2Sr2Ca2Cu3Ox and YBa2Cu3Oy tapes because of the ferromagnetic loss in the NiW- based coated conductor substrate. Similarities and differences in the temperature and frequency dependence of ac transport losses between ( Bi, Pb)(2)Sr2Ca2Cu3Ox and YBa2Cu3Oy tapes are discussed.

引用

页码：516 / 521

页数：6