Abstract
We have studied the low field magnetization hysteresis and relaxation process in pure 2H-NbSe 2 single crystal. Our results show an order of magnitude difference in the relaxation rate for the flux entry and the flux exit. Also, we have observed a characteristic change of slope in M( ln t ) curve in the flux-exit case. We analyse this asymmetry in the relaxation rate and the change of slope in M( ln t ) curve in the framework of surface barrier controlled irreversible magnetic behaviour.
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