Abstract
Mössbauer experiments are described which were designed to contrast the lattice properties of high and low Tc superconductors having the β-W structure. The technique of Kitchens, Craig and Taylor was employed to obtain the ratios of phonon moments which are of importance in McMillans’ analysis of’ strong-coupled’ superconductors. The factor 1/(<ω>o/<ω−1>o) corresponds to the phonon-only part of the electron-phonon coupling parameter λ and, hence, is related to Tc in the theory. Mössbauer results for the V3Ga(Tc∼15°K) -V3Sn(Tc∼4°K) pseudobinary compounds indicate that the concentration dependence of the factor 1/(<ω>o/<ω−1>o) is weaker than that expected from Tc. Lattice softening was observed in the Ga-rich compound, and in a quasiharmonic approximation the temperature dependence of the Debye temperature was obtained.
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© 1974 New England Nuclear Corporation
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Kimball, C.W., Taneja, S.P., Weber, L., Fradin, F.Y. (1974). Lattice Softening and Phonon Moments in High Tc Superconductors. In: Gruverman, I.J., Seidel, C.W., Dieterly, D.K. (eds) Mössbauer Effect Methodology. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-0937-6_5
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DOI: https://doi.org/10.1007/978-1-4684-0937-6_5
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