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Superconducting and normal state properties of dilute alloys of LaSn3 containing Nd impurities

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The results of an investigation of the superconducting and normal state physical properties of (LaNd)Sn3 alloys are reported. Superconducting state data are presented describing the depression of the superconducting transition temperature T cwith Nd impurity concentration, the reduction of the reduced jump in heat capacity ΔC/ΔC 0 with decreasing reduced superconducting transition temperature T c/Tc0, and the pressure dependence of T c. Normal state data for the temperature dependences of the magnetic susceptibility and heat capacity demonstrate the importance of crystalline electric field effects in the physical behavior of (LaNd)Sn3 alloys and indicate that Nd interimpurity magnetic interactions and possibly a small amount of Nd-Sn antisite disorder are manifested in the experimental results. Theories based on an isotropic exchange depairing model are unable to give a satisfactory account of all of the experimental data, suggesting that the physical properties of(LaNd)Sn3 alloys may be modified by processes involving the orbital exchange scattering of host conduction electrons by the Nd impurities.

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Author notes

  1. L. E. DeLong

    Present address: Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky

  2. D. C. Johnston

    Present address: Corporate Research Laboratories, Exxon Research and Engineering Co., Linden, New Jersey

Authors and Affiliations

  1. Department of Physics and Institute for Pure and Applied Physical Sciences, University of California—San Diego, La Jolla, California

    L. E. DeLong, M. Tovar, L. D. Woolf, M. B. Maple & D. C. Johnston

  2. Fachbereich Physik, Universität Regensburg, Regensburg, Germany

    J. Keller

Authors
  1. L. E. DeLong
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  2. M. Tovar
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  3. L. D. Woolf
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  4. M. B. Maple
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  5. D. C. Johnston
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  6. J. Keller
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Additional information

Supported by the U.S. Department of Energy under Contract No. Ey-76-S-03-0034-PA227-3.

Fellow of the Consejo Nacional de Investigaciones, Cientificas y Tecnicas, de la Republica Argentina; leave from Centro Atomico Bariloche, Bariloche, Argentina.

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DeLong, L.E., Tovar, M., Woolf, L.D. et al. Superconducting and normal state properties of dilute alloys of LaSn3 containing Nd impurities. J Low Temp Phys 38, 119–147 (1980). https://doi.org/10.1007/BF00115272

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  • DOI: https://doi.org/10.1007/BF00115272

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