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

Article Article scientifique Article Calorimetric study of YBa2Cu3O6.92 in very high magnetic field: 27 Tesla eng 1994 author Janod E. author Marcenat Christophe 39610 author Baraduc C. author Junod Alain 24686 author Calemczuk R. author Deutscher G. author Henry J.-Y. 1763-1764 10.1016/0921-4534(94)92103-2 0921-4534 http://linkinghub.elsevier.com/retrieve/pii/0921453494921032 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. Dewey 500.2 33 Département de physique de la matière quantique 131 false Physica C: Superconductivity and Its Applications 235-240 7e65b741-8e33-4cec-9001-b6a264a8ce41 Article (Published version) Restricted Calorimetric_Study.pdf 1258559 application/pdf restrictedAccess Faculté des sciences / Section de physique / Département de physique de la matière quantique

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Calorimetric study of YBa₂Cu₃O_6.92 in very high magnetic field: 27 Tesla	Physica C: Superconductivity and Its Applications			1994	418	0

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Marcenat, Christophe