Effects of Magnetic Impurities on Paraconductivity in Superconductors
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Fluctuation-induced conductivity above T. in superconductors containingmagnetic impurities is calculated within the context of the Abrikosov-Gor'kovtheory. Excess conductivity is expressed as the sum of the Aslamazov-Larkin (AL)term, the Maki-Thompson (MT) term and the third term. The third term has nocritical singularity in a bulk. The critical behavior of the AL term and that ofthe MT term are similar to those in the absence of magnetic impurities, respec-tively. But the coefficients of these terms as well as the reduced temperature arerenormalized owing to the presence of magnetic impurities. The Thompsonparameter (5 is derived from the calculation and is expressed as a function oftemperature and the spin-flip relaxation time. The third term in a film is lessstrongly divergent but it is important at higher temperatures.
- 社団法人日本物理学会の論文
- 1977-04-15
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