High critical magnetic field superconductor La3S4 |
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| Authors: | K Westerholt H Bach R Wendemuth S Methfessel |
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| Institution: | Institut für Experimentalphysik IV, Ruhr-Universität Bochum, 4630 Bochum West Germany |
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| Abstract: | We report electrical conductivity, specific heat and magnetization measurements on La3S4 single crystals. The results show, that La3S4 is a strong coupling superconductor with a BCS coherence length of 132 Å. This extremely low value makes La3S4 an intrinsic high critical magnetic field superconductor with a Landau-Ginsburg parameter κ0 of 20. For the temperature gradient of the upper critical magnetic field at the transition temperature we find values up to 35 kG/K. |
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