On the interpretation of the equilibrium magnetization in the mixed state of high-Tc superconductors

Abstract

We apply a recently developed scaling procedure to the analysis of equilibrium magnetization M(H) data that were obtained for T-2212 and Bi-2212single crystals and were reported in the literature. The temperature dependencies of the upper critical field and the magnetic field penetration depth resulting from our analysis are distinctly different from those obtained in the original publications. We argue that theoretical models, which are usually employed for analyses of the equilibrium magnetization in the mixed state of type-II superconductors are not adequate for a quantitative description of high-Tc superconductors. In addition, we demonstrate that the scaled equilibrium magnetization M(H) curve for a Tl-2212 sample reveals a pronounced kink, suggesting a phase transition in the mixed state.

9 pages, 5figures

References in corpus (6)

• Properties of the Ideal Ginzburg-Landau Vortex Lattice
• Temperature dependence of the upper critical field of type-II superconductors from isothermal magnetization data. Application to high temperature superconductors
• Temperature dependence of the upper critical field of high-Tc superconductors from isothermal magnetization data. Application to polycrystalline samples and ceramics
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• On the equilibrium magnetization of high-Tc superconductors below the irreversibility line
• Pinning Action of Correlated Disorder against Equilibrium Properties of HgBa${}_2$Ca${}_2$Cu${}_3$O${}_x$: a Delicate Balance

Cited by in corpus (6)

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• Detailed magnetization study of superconducting properties of YBCO ceramic spheres
• Vanishing of the upper critical field in Bi_2Sr_2CaCu_2O_{8+δ} from Landau-Ott scaling
• Two types of Hc2(T) dependences in Bi_2Sr_2Ca_(1-x)Y_xCu_2O_(8+delta) with different Yttrium content
• Comment on "Enhanced two-dimensional properties of the four-layered cuprate high-Tc superconductor TlBa-2Ca-3Cu-4O-y"
• Scaling of the Equilibrium Magnetization in the Mixed State of Type-II Superconductors