Abstract
There has been considerable interest in the properties of superconductors with paramagnetic impurities (localized spin). These impurities perturb the electrons in a way which is antisymmetric with respect to time reversal, and they therefore tend to break up the Cooper pairs in the superconductor.1 This pair-breaking effect can be used as a probe to investigate both the microscopic properties of the superconductor and the interactions between an impurity spin and the conduction electrons or other impurity spins. Any impurity spin ordering which occurs is expected to affect both the transition temperature2 and the thermal conductivity,3 which is the phenomenon of immediate interest in this investigation.
Research supported in part by the National Science Foundation under Grants Nos. GP-28996 and GH-33634.
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Ginsberg, D.M., Mrstik, B.J. (1974). Electronic Part of the Thermal Conductivity of a Thin, Superconducting Film Composed of Lead and Gadolinium. In: Timmerhaus, K.D., O’Sullivan, W.J., Hammel, E.F. (eds) Low Temperature Physics-LT 13. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-2688-5_155
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