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Scientific article
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Anisotropic specific heat of a Bi2Sr2CaCu2O8 single crystal in magnetic fields up to 14 T

Published inPhysica C: Superconductivity and Its Applications, vol. 235-240, p. 1761-1762
Publication date1994
Abstract

A 0.25 g single crystal of Bi2Sr2CaCu2O8 with a sharp superconducting transition at 85 K was characterized by AC susceptibility, X-ray diffraction, Meissner effect, normal-state susceptibility, magnetization in the mixed state, and specific heat from 1 to 300K. Many unconventional features are found in the specific heat which may be intrinsic features of a 2D superconductor, e.g. a field-independent linear term γ∗T at low T, the absence of a specific heat jump at Tc, a symmetrical logarithmic anomaly at Tc, an almost field-independent transition temperature which coincides with the crossing point of the magnetization, a new crossing point of the specific heat, etc. The accurate data near Tc (<0.02%) allow an expression of ∂(C/T)/∂H by an empirical formula that describes the variation of the specific heat and magnetization over a wide temperature and field range about Tc.

Citation (ISO format)
JUNOD, Alain et al. Anisotropic specific heat of a Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8</sub> single crystal in magnetic fields up to 14 T. In: Physica C: Superconductivity and Its Applications, 1994, vol. 235-240, p. 1761–1762. doi: 10.1016/0921-4534(94)92102-4
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ISSN of the journal0921-4534
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