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Evolution in the split-peak structure across the Peak Effect region in single crystals of 2H-NbSe2

A. D. Thakur, T. V. Chandrasekhar Rao, S. Uji, T. Terashima, M. J. Higgins, S. Ramakrishnan, A. K. Grover

cond-mat.supr-conarXiv:cond-mat/0602382

Abstract

We have explored the presence of a two-peak feature spanning the peak effect (PE) region in the ac susceptibility data and the magnetization hysteresis measurements over a wide field-temperature regime in few weakly pinned single crystals of 2H-NbSe2, which display reentrant characteristic in the PE curve near Tc(0). We believe that the two-peak feature evolves into distinct second magnetization peak anomaly well separated from the PE with gradual enhancement in the quenched random pinning.

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