期刊
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
卷 468, 期 7-10, 页码 765-768出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physc.2007.11.043
关键词
vortex dynamics; I-V characteristics; type-II superconductors; electronic instability
Pulsed I-V measurements performed on wide Nb films of different thickness show the electronic instability, at high driving currents, predicted by Larkin and Ovchinnikov (LO). We find that the associated vortex critical velocity nu* decreases with the film thickness, and its temperature and magnetic field dependences exhibit some discrepancies with respect to the LO theoretical results. (C) 2008 Elsevier B.V. All rights reserved.
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