Characteristic features of low-temperature structural phase transitions in La2-xSrxCuO4

Y. Inoue, Y. Horibe, Yasumasa Koyama

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    Features of low-temperature structural phase transitions in La2-xSrxCuO4 with x=0.115 and 0.15 have been examined by transmission electron microscopy. There are 100-type forbidden spots due to the Pccn/LTT phase as well as fundamental spots due to the LTO phase in the electron-diffraction patterns of La2-xSrxCuO4 with x=0.115 and 0.15 at 12 K. As for 100-type forbidden dark field images at 12 K, a bright-line contrast due to the Pccn/LTT phase exists only along the twin boundary in the LTO phase for x=0.15. In the case of x=0.115, a bright-spot contrast due to the Pccn/LTT phase also appears partially inside the LTO domains, in addition to the bright-line contrast along the twin boundary. That is, the low-temperature transition in X=0.115 is characterized by the appearance of the Pccn/LTT phase with the spotty shape inside the LTO domain.

    Original languageEnglish
    Pages (from-to)361-366
    Number of pages6
    JournalJournal of Superconductivity
    Volume10
    Issue number4
    Publication statusPublished - 1997 Aug

    Fingerprint

    Electron diffraction
    Diffraction patterns
    Superconducting transition temperature
    Phase transitions
    Transmission electron microscopy
    Temperature
    diffraction patterns
    electron diffraction
    transmission electron microscopy

    Keywords

    • La-SrCuO
    • Structural phase transitions
    • Transmission electron microscopy

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Physics and Astronomy (miscellaneous)
    • Condensed Matter Physics

    Cite this

    Characteristic features of low-temperature structural phase transitions in La2-xSrxCuO4 . / Inoue, Y.; Horibe, Y.; Koyama, Yasumasa.

    In: Journal of Superconductivity, Vol. 10, No. 4, 08.1997, p. 361-366.

    Research output: Contribution to journalArticle

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    N2 - Features of low-temperature structural phase transitions in La2-xSrxCuO4 with x=0.115 and 0.15 have been examined by transmission electron microscopy. There are 100-type forbidden spots due to the Pccn/LTT phase as well as fundamental spots due to the LTO phase in the electron-diffraction patterns of La2-xSrxCuO4 with x=0.115 and 0.15 at 12 K. As for 100-type forbidden dark field images at 12 K, a bright-line contrast due to the Pccn/LTT phase exists only along the twin boundary in the LTO phase for x=0.15. In the case of x=0.115, a bright-spot contrast due to the Pccn/LTT phase also appears partially inside the LTO domains, in addition to the bright-line contrast along the twin boundary. That is, the low-temperature transition in X=0.115 is characterized by the appearance of the Pccn/LTT phase with the spotty shape inside the LTO domain.

    AB - Features of low-temperature structural phase transitions in La2-xSrxCuO4 with x=0.115 and 0.15 have been examined by transmission electron microscopy. There are 100-type forbidden spots due to the Pccn/LTT phase as well as fundamental spots due to the LTO phase in the electron-diffraction patterns of La2-xSrxCuO4 with x=0.115 and 0.15 at 12 K. As for 100-type forbidden dark field images at 12 K, a bright-line contrast due to the Pccn/LTT phase exists only along the twin boundary in the LTO phase for x=0.15. In the case of x=0.115, a bright-spot contrast due to the Pccn/LTT phase also appears partially inside the LTO domains, in addition to the bright-line contrast along the twin boundary. That is, the low-temperature transition in X=0.115 is characterized by the appearance of the Pccn/LTT phase with the spotty shape inside the LTO domain.

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