Internal friction and shear modulus in bismuth ceramics at <i>T</i>&lt;<i>T</i> <i>c</i>
M. B. LazarevaNational Science Center, Physicotechnical Institute, 310108 KharkovV. S. OkovitNational Science Center, Physicotechnical Institute, 310108 KharkovV. T. PetrenkoNational Science Center, Physicotechnical Institute, 310108 KharkovG. G. SergeevaNational Science Center, Physicotechnical Institute, 310108 KharkovYa. D. StarodubovNational Science Center, Physicotechnical Institute, 310108 KharkovМ. А. ТихоновскийNational Science Center, Physicotechnical Institute, 310108 KharkovL. A. ChirkinaNational Science Center, Physicotechnical Institute, 310108 Kharkov
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Аннотация
Low-frequency internal friction and shear modulus of bismuth ceramics are investigated at various deformation amplitudes in the temperature range 4.2–300 K. A change in the internal friction background, a nonmonotonic temperature dependence of the shear modulus, and a low-temperature anomaly in internal frictions at T = 0.3Tc are observed during the superconducting transition. The results of investigations point towards a weakening of bismuth ceramics at T &lt; Tc and towards an analogy between inelastic deformation in the superconducting states of low-temperature and high-temperature superconductors.
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