Lower Critical Field, Anisotropy, and Two-Gap Features of LiFeAs

Details Lower Critical Field, Anisotropy, and Two-Gap Features of LiFeAs Lower Critical Field, Anisotropy, and Two-Gap Features of LiFeAs

2010-04-08

arxiv.org/abs/1004.1387v1

Physics

Condensed Matter

Superconductivity

19 pages, 5 figures

Scientific paper

10.1103/PhysRevB.81.144512

The magnetic properties of LiFeAs, as single crystalline and polycrystalline samples, were investigated. The lower critical field deduced from the vortex penetration of two single crystals appears to be almost isotropic with a temperature dependence closer to that of two-gap superconductors. The parameters extracted from the reversible magnetizations of sintered polycrystalline samples are in good agreement with those from the single crystal data.

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