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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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