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Nonequilibrium dynamics in type-II superconductors with inhomogeneous vortex pinning

By X.B. Xu, H. Fangohr, X.N. Xu, M. Gu, S.Y. Ding, D.Q. Shi and S.X. Dou


We study numerically the dynamics relating to negative vortex motion in inhomogeneous pinning systems. We show that this dynamical phenomenon results from the internal field effect produced by the growing local barriers with decreasing temperature. We find that the negative motion is characterized by a peak of negative voltage or resistance in resistance–temperature transport measurements. We also demonstrate that the time window to observe the negative motion is determined by the magnitude of driving force in addition to the temperature scanning rat

Topics: QC
Year: 2009
OAI identifier:
Provided by: e-Prints Soton

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