標題: Analysis of average transport critical current density of oxide superconductors deposited on a silver base
作者: Lee, WD
Yang, TJ
Chiou, BS
電子物理學系
電控工程研究所
Department of Electrophysics
Institute of Electrical and Control Engineering
關鍵字: critical current density;high-T-c oxide superconductor;silver base;self-field effect
公開日期: 1-一月-1996
摘要: Considering the resistivity of a silver base and the contact resistance of a silver base with a bulk superconductor, the dependence of average critical current density J(c)(D,H-a) of a high-T-c, oxide superconductor deposited oil a silver base on the sample dimension D and the applied magnetic field H-a is calculated using a generalized critical-state model, which was recently extended to low field by Chen and Yang [Physica C 224 (1994) 345]. The self-field effect of the average critical current was also taken into account in the model. Based on the generalized critical state model, new behaviors of J(c)(D, H-a) in the low-field range of H-c1 less than or equal to H-a much less than H-c2 are obtained. In addition, a constant J(c)(D, H-a) for 0 less than or equal to H-a less than or equal to H-c1 is obtained, which is different from the results derived from a model that does not include the self-field effect. However, these theoretical results can be fitted to the experimental data to obtain some important macroscopic material parameters and may be used to interpret the dimension effect of transport J(c) of a high-T-c oxide superconductor deposited on a silver base.
URI: http://dx.doi.org/10.1143/JJAP.35.76
http://hdl.handle.net/11536/1572
ISSN: 0021-4922
DOI: 10.1143/JJAP.35.76
期刊: JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS
Volume: 35
Issue: 1A
起始頁: 76
結束頁: 81
顯示於類別:期刊論文


文件中的檔案:

  1. A1996TU37000013.pdf