Effect of second‐phase precipitates and deposition temperature on the hysteretic losses in CVD‐prepared Nb3Ge
作者:
J. D. Thompson,
M. P. Maley,
L. R. Newkirk,
期刊:
Applied Physics Letters
(AIP Available online 1977)
卷期:
Volume 30,
issue 4
页码: 190-192
ISSN:0003-6951
年代: 1977
DOI:10.1063/1.89346
出版商: AIP
数据来源: AIP
摘要:
Hysteretic losses have been measured on a large number of Nb3Ge samples prepared by the chemical vapor deposition process. These measurements were performed as a function of induced current and temperature on samples which contained differing amounts of second‐phase material, Nb5Ge3. It was found that very low 50‐Hz losses, on the order of 20 &mgr;W/cm2at 500 rms A/cm and at temperatures of up to 12 K, could be attained in as‐deposited material. An apparent correlation between the critical current density and the Nb5Ge3content was observed, which suggested that enhanced pinning due to the second‐phase precipitates was responsible for these low losses.
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