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Title

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

Authors
Wang, K.-Q.
Published in Physica C: Superconductivity and Its Applications. 1994, vol. 235-240, p. 1761-1762
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.
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JUNOD, Alain et al. Anisotropic specific heat of a Bi2Sr2CaCu2O8 single crystal in magnetic fields up to 14 T. In: Physica C: Superconductivity and Its Applications, 1994, vol. 235-240, p. 1761-1762. https://archive-ouverte.unige.ch/unige:98897

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Deposited on : 2017-11-13

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