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Specific heat of single crystalline YBa2Cu3O7 in 20 Tesla

Bonjour, E.
Calemczuk, R.
Henry, J.-Y.
Vallier, J.-C.
Published in Physica B: Condensed Matter. 1994, vol. 194-196, p. 1499-1500
Abstract The specific heat of a single crystal of YBa2Cu3O7 is measured from 40 to 150 K in magnetic fields up to 20 Tesla applied either parallel or normal to the c axis. Adiabatic calorimetry with a scatter well below 0.1% is used. The scaling of the superconducting transitions determines the bulk anisotropy ratio, 5.5±0.5. A Maki-like term is observed at intermediate temperatures. The unusual behaviour of YBa2Cu3O7 in a field, featuring a considerable smearing of the transition and an apparently field-independent onset, may be qualitatively understood as a phenomenological consequence of the small and anisotropic value of the coherence length alone, using the relevant models of field-induced critical 1-D fluctuations on one hand, and London-like regime for the mean-field part of the transition on the other hand.
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JUNOD, Alain et al. Specific heat of single crystalline YBa2Cu3O7 in 20 Tesla. In: Physica B: Condensed Matter, 1994, vol. 194-196, p. 1499-1500. https://archive-ouverte.unige.ch/unige:98927

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Deposited on : 2017-11-14

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