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Direct Observation of Superheating and Supercooling of Vortex Matter using Neutron Diffraction

X. S. Ling·S. R. Park·B. A. McClain·S. M. Choi·D. C. Dender·J. W. Lynn
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Abstract

We report the first observation of a striking history dependence of the structure function of the vortex matter in the peak effect regime in a Nb single crystal by using small angle neutron scattering combined with {\it in situ} magnetic susceptibility measurements. Metastable phases of vortex matter, supercooled vortex liquid and superheated vortex solid, have been identified. We interpret our results as direct structural evidence for a first-order solid-liquid transition at the peak effect.

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X. S. Ling, S. R. Park, B. A. McClain, S. M. Choi, D. C. Dender, J. W. Lynn. 2000-08-24. Direct Observation of Superheating and Supercooling of Vortex Matter using Neutron Diffraction. https://arxiv.org/abs/cond-mat/0008353

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