Observation of vortex lattice melting in large untwinned YBa2Cu3O7-x single crystals
Abstract
We present a study of the vortex lattice in untwinned YBa2Cu3O7-x crystals, using a combination of muon spin rotation and neutron small angle scattering measurements. Both methods show a very sharp melting temperature consistent with a first order transition. The dependence of the melting temperature on the angle of the field with respect to the crystallographic c-axis is studied. The results are compared to thermal measurements.
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