Vanishing of the upper critical field in Bi_2Sr_2CaCu_2O_{8+δ} from Landau-Ott scaling

Abstract

We apply Landau-Ott scaling to the reversible magnetization data of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ published by Y. Wang et al. [\emph{Phys. Rev. Lett. \textbf{95} 247002 (2005)}] and find that the extrapolation of the Landau-Ott upper critical field line vanishes at a critical temperature parameter, T^*_c, a few degrees above the zero resistivity critical temperature, T_c. Only isothermal curves below and near to T_c were used to determine this transition temperature. This temperature is associated to the disappearance of the mixed state instead of a complete suppression of superconductivity in the sample.

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References in corpus (2)

• Landau and Ott scaling for the kinetic energy density and the low $T_c$ conventional superconductors, $L{i}_{2}P{d}_{3}B$ and Nb
• Temperature dependence of the upper critical field of high-Tc superconductors from isothermal magnetization data. Influence of a temperature dependent Ginzburg-Landau parameter

Cited by in corpus (1)

• Fluctuation diamagnetism around the superconducting transition in a cuprate crystal with a reduced Meissner fraction