Observation of a structural-fluctuation enhancement in the vicinity of superconducting transitions in Ba1-xMxBiO3 (M=K,Rb)

Yasumasa Koyama, S. I. Nakamura, Y. Inoue

    Research output: Contribution to journalArticle

    13 Citations (Scopus)

    Abstract

    Features of structural fluctuations related to the cubic-to-orthorhombic transition in Ba1-xMxBiO3 (M=K, Rb) have been investigated in detail by means of electron diffraction. A fluctuation due to the softening of the R25 mode, which is responsible for the transition, is detected as diffuse scattering at the R point in the reciprocal space of the cubic phase. When x is reduced from x=0.5 to a transition composition in the cubic phase, the fluctuation is enhanced remarkably at lower temperatures. Because the fluctuation of the R25 mode results in those of spontaneous strains, the fluctuations of the A1g and Eg strains are understood to be enhanced near the superconducting transition.

    Original languageEnglish
    Pages (from-to)9186-9189
    Number of pages4
    JournalPhysical Review B
    Volume46
    Issue number14
    DOIs
    Publication statusPublished - 1992

    Fingerprint

    augmentation
    Electron diffraction
    Scattering
    Chemical analysis
    softening
    Temperature
    electron diffraction
    scattering

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

    Observation of a structural-fluctuation enhancement in the vicinity of superconducting transitions in Ba1-xMxBiO3 (M=K,Rb). / Koyama, Yasumasa; Nakamura, S. I.; Inoue, Y.

    In: Physical Review B, Vol. 46, No. 14, 1992, p. 9186-9189.

    Research output: Contribution to journalArticle

    @article{276c4c43fa0d4492b3388b6eefcb2b4e,
    title = "Observation of a structural-fluctuation enhancement in the vicinity of superconducting transitions in Ba1-xMxBiO3 (M=K,Rb)",
    abstract = "Features of structural fluctuations related to the cubic-to-orthorhombic transition in Ba1-xMxBiO3 (M=K, Rb) have been investigated in detail by means of electron diffraction. A fluctuation due to the softening of the R25 mode, which is responsible for the transition, is detected as diffuse scattering at the R point in the reciprocal space of the cubic phase. When x is reduced from x=0.5 to a transition composition in the cubic phase, the fluctuation is enhanced remarkably at lower temperatures. Because the fluctuation of the R25 mode results in those of spontaneous strains, the fluctuations of the A1g and Eg strains are understood to be enhanced near the superconducting transition.",
    author = "Yasumasa Koyama and Nakamura, {S. I.} and Y. Inoue",
    year = "1992",
    doi = "10.1103/PhysRevB.46.9186",
    language = "English",
    volume = "46",
    pages = "9186--9189",
    journal = "Physical Review B-Condensed Matter",
    issn = "0163-1829",
    publisher = "American Institute of Physics Publising LLC",
    number = "14",

    }

    TY - JOUR

    T1 - Observation of a structural-fluctuation enhancement in the vicinity of superconducting transitions in Ba1-xMxBiO3 (M=K,Rb)

    AU - Koyama, Yasumasa

    AU - Nakamura, S. I.

    AU - Inoue, Y.

    PY - 1992

    Y1 - 1992

    N2 - Features of structural fluctuations related to the cubic-to-orthorhombic transition in Ba1-xMxBiO3 (M=K, Rb) have been investigated in detail by means of electron diffraction. A fluctuation due to the softening of the R25 mode, which is responsible for the transition, is detected as diffuse scattering at the R point in the reciprocal space of the cubic phase. When x is reduced from x=0.5 to a transition composition in the cubic phase, the fluctuation is enhanced remarkably at lower temperatures. Because the fluctuation of the R25 mode results in those of spontaneous strains, the fluctuations of the A1g and Eg strains are understood to be enhanced near the superconducting transition.

    AB - Features of structural fluctuations related to the cubic-to-orthorhombic transition in Ba1-xMxBiO3 (M=K, Rb) have been investigated in detail by means of electron diffraction. A fluctuation due to the softening of the R25 mode, which is responsible for the transition, is detected as diffuse scattering at the R point in the reciprocal space of the cubic phase. When x is reduced from x=0.5 to a transition composition in the cubic phase, the fluctuation is enhanced remarkably at lower temperatures. Because the fluctuation of the R25 mode results in those of spontaneous strains, the fluctuations of the A1g and Eg strains are understood to be enhanced near the superconducting transition.

    UR - http://www.scopus.com/inward/record.url?scp=0000396623&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=0000396623&partnerID=8YFLogxK

    U2 - 10.1103/PhysRevB.46.9186

    DO - 10.1103/PhysRevB.46.9186

    M3 - Article

    AN - SCOPUS:0000396623

    VL - 46

    SP - 9186

    EP - 9189

    JO - Physical Review B-Condensed Matter

    JF - Physical Review B-Condensed Matter

    SN - 0163-1829

    IS - 14

    ER -