Evidence of a first order like jump in equilibrium magnetization across the peak effect region in superconducting 2H-NbSe$_2$

Details Evidence of a first order like jump in equilibrium magnetization across the peak effect region in superconducting 2H-NbSe$_2$ Evidence of a first order like jump in equilibrium magnetization across the peak effect region in superconducting 2H-NbSe$_2$

1998-10-16

arxiv.org/abs/cond-mat/9810204v1

Physics

Condensed Matter

Superconductivity

To be presented at "Experimental Workshop on High Temperature Superconductors and Related Materials (Advanced Activities)" to

Scientific paper

We report magnetization hysteresis measurements in the peak effect region of a very clean single crystal of superconducting 2H-NbSe$_2$ at temperatures very close to T$_c$(0). Through measurement of minor magnetization curves, we infer the equilibrium magnetization curve across the PE region. We observe a small first order like change in equilibrium magnetization across the peak effect. We relate this observation to the entropy change associated with the order-disorder transformation. We further note that the first order like change in the equilibrium magnetization observed in 2H-NbSe$_2$ is comparable to the change(s)observed in the equilibrium magnetization at the FLL melting transition in various high temperature superconductors.

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