Heat capacity of untwinned YBa2Cu3O7-x in magnetic fields: Dimensional cross-over near Tc

M.B. Salamon, S.E. Inderhees, J.P. Rice and D.M. Ginsberg

Physica A: Statistical Mechanics and its Applications, 1990, vol. 168, issue 1, 283-290

Abstract: The heat capacity of an untwinned single crystal of YBa2Cu3O7-x has been measured over a temperature range near Tc and in applied fields to 7 T. The sharp zero-field transition is significantly broadened by the field, but shifted to only slightly lower temperatures. The results are analyzed in the context of a cross-over from three dimensions to one dimensions, caused by the existence of the flux lattice. The data are consistent with finite-size analysis of the cross over, with a length scale that varies as B-12 and a logarithmic divergence of the infinite-length-scale heat capacity.

Date: 1990
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:168:y:1990:i:1:p:283-290

DOI: 10.1016/0378-4371(90)90379-7

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