A study of supercooling of the disordered vortex phase via minor hysteresis loops in 2H-NbSe2
G. Ravikumar
Abstract
We report on the observation of novel features in the minor hysteresis loops in a clean crystal of NbSe2 which displays a peak effect. The observed behavior can be explained in terms of a supercooling of the disordered vortex phase while cooling the superconductor in a field. Also, the extent of spatial order in a flux line lattice formed in ascending fields is different from (and larger than) that in the descending fields below the peak position of the peak effect; this is attributed to unequal degree of annealing of the state induced by a change of field in the two cases.
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