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Critical fields and generalized Ginzburg-Landau parameters for Mo-Re alloys containing paramagnetic impurities
Authors:H. E. Hoenig  N. Barth
Affiliation:(1) Physikalisches Institut der Universität, Frankfurt am Main, Germany
Abstract:
We have investigated the temperature dependence of the upper critical fieldHc2 and the thermodynamical fieldHc for superconducting Mo-Re alloys containing magnetic impurities. In addition, the temperature dependence of the Ginzburg-Landau parameters kappa1(T) and kappa2(T) has been determined by measuring the magnetization and the specific heat. Our findings are compared with the theory of Fulde and Maki. In agreement with theory, our measurements show that the two pair-breaking mechanisms involved (magnetic field and magnetic impurities) are nonadditive if one departs from the linearized Ginzburg-Landau equation.
Keywords:
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