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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