Mixed state properties of superconducting MgB2 single crystals
M. Zehetmayer, M. Eisterer, H. W. Weber, J. Jun, S. M. Kazakov, J. Karpinski, A. Wisniewski
Abstract
We report on measurements of the magnetic moment in superconducting MgB2 single crystals. We find μ0Hc2c(0) = 3.2 T, μ0Hc2ab(0) = 14.5 T, γ= 4.6, μ0Hc(0) = 0.28 T, and κ(Tc) = 4.7. The standard Ginzburg-Landau and London model relations lead to a consistent data set and indicate that MgB2 is a clean limit superconductor of intermediate coupling strength with very pronounced anisotropy effects.
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