FLUX-MOTION RELATED AC LOSSES IN HIGH T-c SUPERCONDUCTORS

被引：1
|
作者：
Chen, Q. Y. [1 ]
机构：
[1] Univ Houston, Texas Ctr Superconduct, 3201 Cullen Blvd, Houston, TX 77204 USA
来源：
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1993年 / 3卷 / 01期
关键词：
D O I：
10.1109/77.233633
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The ac losses of high temperature superconductors in the flux-depinned mixed-state have been treated using the classical magnetic diffusion equation in conjunction with various models of flux-motion. With the imaginary part representing the ac losses, the field and frequency dependent ac susceptibilities, (chi) over tilde ac=chi'+i chi '', were investigated. chi '' was found to obey a scaling rule with a characteristic frequency, estimated to be similar to 10(5)-10(9) Hz, that depended on the sample size and normal state resistivity. This frequency range agrees with earlier experimental results, which could not be accounted for previously based upon the notion of thermally activated hopping of vortices. The frequency scaling behaviors using flux-creep and flux-flow models are presented.
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页码：1413 / 1416
页数：4
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