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Reduced flux motion via flux creep annealing in high‐Jcsingle‐crystal Y1Ba2Cu3O7

 

作者: J. R. Thompson,   Yang Ren Sun,   A. P. Malozemoff,   D. K. Christen,   H. R. Kerchner,   J. G. Ossandon,   A. D. Marwick,   F. Holtzberg,  

 

期刊: Applied Physics Letters  （AIP Available online 1991）
卷期: Volume 59, issue 20  

页码: 2612-2614

 

ISSN:0003-6951

 

年代: 1991

 

DOI:10.1063/1.105918

 

出版商: AIP

 

数据来源: AIP

 

摘要:

We investigated the stabilization of magnetic flux in a high‐temperature superconductor (a proton‐irradiated Y1Ba2Cu3O7crystal), by operating with subcritical current densityJ. Using the thermal history to obtain an induced current densityJ≤Jc, we observed a drastically reduced relaxation ratedM/dt(M=magnetization), after ‘‘flux creep annealing.’’ The results show that the field gradient ∼J∼Mdetermined the relaxation rate, independent of the sample’sH‐Thistory, in agreement with recent theory.

 

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