Single Crystal Growth and Anisotropic Superconducting Property of PuRhGa_5(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

概要

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We grew a single crystal of the transuranium superconductor PuRhGa_5 with the tetragonal structure by the Ga-flux method, and measured its magnetic susceptibility, magnetization and AC susceptibility. The magnetic susceptibility is found to reveal no distinct anisotropy between H‖[100] and [001]. The upper critical field H_<c2> for superconductivity is, however, highly anisotropic: H_<c2>(0)=270kOe for H‖[100] and 150kOe for H‖[001]. The angular dependence of H_<c2> is well fitted by the anisotropic mass model, reflecting a quasi-two-dimensional electronic state. The Maki parameter κ_2 and thermodynamical critical field H_c are approximately determined as κ_2≃50 and H_c(0)=4.7kOe from the equilibrium magnetization curve.
社団法人日本物理学会の論文
2005-06-15