Peak effect in the critical current of Type II superconductors with strong magnetic vortex pinning
Peak effect in the critical current of Type II superconductors with strong magnetic vortex pinning
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.
147002-[4pp.]
Xu, X.B.
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Fangohr, H.
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Xu, X.N.
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Gu, M.
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Wang, Z.H.
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Ji, S.M.
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Ding, S.Y.
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Shi, D.Q.
294be8e6-69c8-4cac-9fde-4dae24c47748
Dou, S.X.
896fcf39-9c7c-459e-a50b-11efc49b05a6
3 October 2008
Xu, X.B.
a2ddcbc4-6195-426f-b0dc-60e6f560fa07
Fangohr, H.
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
Xu, X.N.
fe0645d3-cbf8-48dd-bdb8-7b610e35cf95
Gu, M.
9f22a6ef-7e9e-4074-b0de-c1e843705d96
Wang, Z.H.
8ed29dad-b9a9-4f17-8aef-7da278c2a057
Ji, S.M.
f9b19f2c-dca2-4f0f-b563-d0779b7d9c99
Ding, S.Y.
fd2e0fdd-9f94-4a65-a228-afffd99c000b
Shi, D.Q.
294be8e6-69c8-4cac-9fde-4dae24c47748
Dou, S.X.
896fcf39-9c7c-459e-a50b-11efc49b05a6
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), .
(doi:10.1103/PhysRevLett.101.147002).
Abstract
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.
Text
Xu_08.pdf
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e-pub ahead of print date: 29 September 2008
Published date: 3 October 2008
Organisations:
Computational Engineering and Design
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Local EPrints ID: 64103
URI: http://eprints.soton.ac.uk/id/eprint/64103
PURE UUID: 4ef9b0b0-c66e-42c9-9886-12bc19c1ec89
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Date deposited: 01 Dec 2008
Last modified: 16 Mar 2024 03:09
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Contributors
Author:
X.B. Xu
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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