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Establishment of a stable vortex state in the peak effect region in a weakly pinned superconductor CeRu2

A. A. Tulapurkar, D. Heidarian, S. Sarkar, S. Ramakrishnan, A. K. Grover, E. Yamamoto, Y. Haga, M. Hedo, Y. Inada, Y. Onuki

cond-mat.supr-conarXiv:cond-mat/0009069

Abstract

We present magnetization data on a weakly pinned CeRu2 single crystal showing the existence of a stable state of the vortex lattice in the peak effect region. The stable state is achieved by cycling the magnetic field by small amplitude. This stable state is characterized by a unique value of critical current density (Jc), independent of the magnetic history of the sample. The results support the recent model proposed by Ravikumar et al r39 on the history dependence of the Jc.

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