Abstract
The temperature dependence of the elastic constants of niobium and lead was measured in the normal and superconducting states. Both a continuous wave and a coherent gated-carrier technique were used to measure the velocity changes associated with the superconducting transition. The elastic constants were found to exhibit the same temperature dependence as the free energy in either state. The discontinuity in the modulus associated with longitudinal strains and the slope discontinuities at the transition temperature were used to calculate the strain dependence of the transition temperature. The strain dependence in all cases is mainly quadratic.
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Research supported by a NSF Grant and in part by the Office of Naval Research.
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Trivisonno, J., Vatanayon, S., Wilt, M. et al. Temperature dependence of the elastic constants of niobium and lead in the normal and superconducting states. J Low Temp Phys 12, 153–169 (1973). https://doi.org/10.1007/BF00654733
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DOI: https://doi.org/10.1007/BF00654733