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Free energy and thermodynamical critical fieldH c (T) of a superconductor with crystalline-field-split magnetic impurities: (La/itPr)Sn3 |
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| Authors: | J. Keller P. Holzer R. W. McCallum C. A. Luengo M. B. Maple A. R. Sweedler |
| Affiliation: | (1) Fachbereich Physik, Universität Regensburg, Regensburg, Germany;(2) Institute for Pure and Applied Physical Sciences, University of California at San Diego, La Jolla, California;(3) Brookhaven Laboratory, Upton, New York;(4) Present address: Institute of Physics, University of Campinas, Campinas, Brazil |
| Abstract: | An expression for the free energy of a superconductor containing magnetic impurities with crystalline-field-split energy levels is derived. It is used to calculate the thermodynamic critical fieldHc(T) of(LaPr)Sn3. ExperimentallyHc(T) is determined from measurements of the heat capacity of(LaPr)Sn3 in the normal and superconducting states. The two results are in general agreement and demonstrate the role of the inelastic pair-breaking mechanism in this nonmagnetic ground-state system.Supported by the U.S. Energy Research and Development Administration under Contract No. ERDA E(04-3)-34 PA 227. |
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