Thermal expansion of superconducting Bi2Sr2CaCu2O8

Toru Asahi, H. Suzuki, M. Nakamura, H. Takano, J. Kobayashi

    Research output: Contribution to journalArticle

    14 Citations (Scopus)

    Abstract

    Temperature dependences of thermal strains of superconducting Bi2Sr2CaCu2O8 were measured by using the two-dimensional reciprocal-lattice method of x-ray diffraction in the temperature range between 15 and 300 K. Accuracies of measuring the lattice strains attained 1.6×10-6. Very small anomalies of the lattice constants and lattice volume took place at Tc of the transition point. They were caused by definite discontinuities of the thermal-expansion coefficients. Using previously reported values of specific heat and isotropic compressibility a nearly temperature-independent equivalent Grüneisen parameter γΤ was derived as 0.89±0.11. From the extrapolation of the lattice volume of the high-temperature phase into the superconducting temperature region, additive lattice strains were found to appear spontaneously in the superconducting phase. From this fact it was concluded that a structural phase transition of the second order took place with the onset of superconductivity.

    Original languageEnglish
    Pages (from-to)9125-9129
    Number of pages5
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume55
    Issue number14
    Publication statusPublished - 1997 Apr 1

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    Thermal expansion
    thermal expansion
    Temperature
    Superconductivity
    Compressibility
    Extrapolation
    Crystal lattices
    Lattice constants
    Specific heat
    transition points
    Diffraction
    Phase transitions
    compressibility
    temperature
    extrapolation
    discontinuity
    x ray diffraction
    superconductivity
    X rays
    specific heat

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

    Asahi, T., Suzuki, H., Nakamura, M., Takano, H., & Kobayashi, J. (1997). Thermal expansion of superconducting Bi2Sr2CaCu2O8 Physical Review B - Condensed Matter and Materials Physics, 55(14), 9125-9129.

    Thermal expansion of superconducting Bi2Sr2CaCu2O8 . / Asahi, Toru; Suzuki, H.; Nakamura, M.; Takano, H.; Kobayashi, J.

    In: Physical Review B - Condensed Matter and Materials Physics, Vol. 55, No. 14, 01.04.1997, p. 9125-9129.

    Research output: Contribution to journalArticle

    Asahi, T, Suzuki, H, Nakamura, M, Takano, H & Kobayashi, J 1997, 'Thermal expansion of superconducting Bi2Sr2CaCu2O8 ', Physical Review B - Condensed Matter and Materials Physics, vol. 55, no. 14, pp. 9125-9129.
    Asahi, Toru ; Suzuki, H. ; Nakamura, M. ; Takano, H. ; Kobayashi, J. / Thermal expansion of superconducting Bi2Sr2CaCu2O8 In: Physical Review B - Condensed Matter and Materials Physics. 1997 ; Vol. 55, No. 14. pp. 9125-9129.
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