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An anomaly in the angular dependence of critical current densities of niobium films

✍ Scribed by Gin-ichiro Oya; Yasuji Sawada

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
429 KB
Volume
165-166
Category
Article
ISSN
0921-4526

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✦ Synopsis

The angular dependence of critical current density J c of a highly pure single-crystal Nb film in the mixed state near its upper critical field Bc2 is measured and compared with that of a less pure polycrystalline Nb one. An anomalous behavior of J c is found in addition to a high Jc due to the pinning of flux lines at the surface for the single-crystal film. The anomaly is discussed with respect to an interaction between the flux-line lattice and Nb crystal lattice.

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