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Article Dans Une Revue Physica C: Superconductivity and its Applications Année : 2003

Superconducting phase diagram of single crystal MgB2

Résumé

Using magnetization, transport and single-crystal specific heat measurements we have determined the superconducting phase diagram of MgB2. A zero-temperature in-plane coherence length of 9.4 nm is found. The superconducting anisotropy c changes monotonously from a value around 2 near Tc to above 4.5 near 22 K. We present strong evidence for a surface superconducting state for Hkc which might account for the wide spread in reported values of the superconducting anisotropy.
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hal-00957225 , version 1 (09-03-2014)

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  • HAL Id : hal-00957225 , version 1

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U. Welp, A. Rydh, G. Karapetrov, W.K. Kwok, G.W. Crabtree, et al.. Superconducting phase diagram of single crystal MgB2. Physica C: Superconductivity and its Applications, 2003, 387, pp.137. ⟨hal-00957225⟩
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