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Peak effect in the critical current of Type II superconductors with strong magnetic vortex pinning

Xu, X.B., Fangohr, H., Xu, X.N., Gu, M., Wang, Z.H., Ji, S.M., Ding, S.Y., Shi, D.Q. and Dou, S.X. (2008) Peak effect in the critical current of Type II superconductors with strong magnetic vortex pinning Physical Review Letters, 101, (14), 147002-[4pp.]. (doi:10.1103/PhysRevLett.101.147002).

Record type: Article


We perform 2D Langevin simulations studying the peak effect (PE) of the critical current taking into account the temperature dependence of the competing forces. We observe and report that the PE results from the competition of vortex-vortex interactions and vortex-pin interactions which have different temperature dependencies. The simulations reveal that the PE can take place only for certain pinning strengths, densities of pinning centers, and driving forces, which is in good agreement with experiments. No apparent vortex order-disorder transition is observed across the PE regime. In addition, the PE is a dynamical phenomenon, and thermal fluctuations can speed up the process for the formation of the PE.

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e-pub ahead of print date: 29 September 2008
Published date: 3 October 2008
Organisations: Computational Engineering and Design


Local EPrints ID: 64103
PURE UUID: 4ef9b0b0-c66e-42c9-9886-12bc19c1ec89

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Date deposited: 01 Dec 2008
Last modified: 17 Jul 2017 14:14

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Author: X.B. Xu
Author: H. Fangohr
Author: X.N. Xu
Author: M. Gu
Author: Z.H. Wang
Author: S.M. Ji
Author: S.Y. Ding
Author: D.Q. Shi
Author: S.X. Dou

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