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Strong flux pinning centers in Y‐Ba‐Cu‐O films prepared by chemical vapor deposition

 

作者: K. Watanabe,   T. Matsushita,   N. Kobayashi,   H. Kawabe,   E. Aoyagi,   K. Hiraga,   H. Yamane,   H. Kurosawa,   T. Hirai,   Y. Muto,  

 

期刊: Applied Physics Letters  (AIP Available online 1990)
卷期: Volume 56, issue 15  

页码: 1490-1492

 

ISSN:0003-6951

 

年代: 1990

 

DOI:10.1063/1.103211

 

出版商: AIP

 

数据来源: AIP

 

摘要:

The Y‐Ba‐Cu‐O film prepared by chemical vapor deposition showedTc=91.5 K andBc2(77.3 K)=60 T defined by zero resistance. TheJcvalues measured at 77.3 K were 7.8×105A/cm2atB=0 and 1.0×105A/cm2at 16 T, magnetic fields perpendicular to thecaxis. Small disk‐shaped precipitates possibly regarded as strong flux pinning centers in the Y‐Ba‐Cu‐O films were observed using transmission electron microscopy. The evaluation ofJcrelated to the concentration and configuration of the precipitates was in reasonable agreement with the measuredJcvalues.

 

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