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Title

Calorimetric study of YBa2Cu3O6.92 in very high magnetic field: 27 Tesla

Authors
Janod, E.
Baraduc, C.
Calemczuk, R.
Deutscher, G.
Henry, J.-Y.
Published in Physica C: Superconductivity and Its Applications. 1994, vol. 235-240, p. 1763-1764
Abstract The specific heat of a large YBa2Cu3O6.92 single crystal (m≈150 mg) was measured between 0 and 27 Tesla. In contrast with previous results obtained at lower fields, the specific heat above Tc is field-dependent up to 100 K. The high magnetic fields combined with a narrow transition width (ΔTc10–90%=0.15 K in ac susceptibility) allow an accurate analysis of the different contributions in the vicinity of Tc(H=0). 2D–3D gaussian and 3D-xy critical fluctuations models are compared. A positive curvature of Hc2(T) line is observed up to 10 Tesla. The compatibility of the calorimetric and magnetic measurements [1] through Maxwell's relation is also verified.
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JANOD, E. et al. Calorimetric study of YBa2Cu3O6.92 in very high magnetic field: 27 Tesla. In: Physica C: Superconductivity and Its Applications, 1994, vol. 235-240, p. 1763-1764. https://archive-ouverte.unige.ch/unige:98898

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