Could exist the Abrikosov vortex state in type-II superconductors without pinning?

The resistive properties of thin NbO x films above and below H c2 were investigated experimentally. It was shown that in thin amorphous films the vortex pinning appears much below H c2. The position of the vortex pinning appearance moves up to H c2 with film thickness increase and pinning value incr...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 1994-12, Vol.235, p.1945-1946
Main Authors: Nikulov, A.V., Remisov, D.Yu, Oboznov, V.A.
Format: Article
Language:English
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Summary:The resistive properties of thin NbO x films above and below H c2 were investigated experimentally. It was shown that in thin amorphous films the vortex pinning appears much below H c2. The position of the vortex pinning appearance moves up to H c2 with film thickness increase and pinning value increase. A non-perturbative fluctuation theory of the mixed state of two-dimensional type-II superconductor in the lowest Landau level (LLL) approximation is proposed.
ISSN:0921-4534
1873-2143
DOI:10.1016/0921-4534(94)92194-6