New aspect of low-temperature phase transitions of La-cuprates

Y. Horibe, Y. Inoue, Yasumasa Koyama

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    The change in the microstructure on aging at 12 K below a low-temperature structural phase transition in La1.5Sr0.1Nd0.4CuO4 has been examined by transmission electron microscopy. From a series of 100 forbidden dark field images obtained in in situ observation, spotty-shape regions with a Pccn/LTT tilt of the CuO6 octahedron were found to be nucleated and grow inside a LTO domain, accompanying the annihilation of some spotty-shape regions. In addition, there exists a tweed texture in fundamental dark field images, which is due to the macroscopic strain involved in the transition. Because a map of the tweed texture is different from that of the spotty-shape region, the tilt of the octahedron is not always coupled to a proper spontaneous strain.

    Original languageEnglish
    Pages (from-to)461-466
    Number of pages6
    JournalJournal of Superconductivity
    Volume10
    Issue number4
    Publication statusPublished - 1997 Aug

    Fingerprint

    cuprates
    Textures
    Phase transitions
    textures
    Aging of materials
    Transmission electron microscopy
    Temperature
    Microstructure
    transmission electron microscopy
    microstructure

    Keywords

    • La-cuprates
    • Phase transition
    • Transmission electron microscopy

    ASJC Scopus subject areas

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

    Cite this

    New aspect of low-temperature phase transitions of La-cuprates. / Horibe, Y.; Inoue, Y.; Koyama, Yasumasa.

    In: Journal of Superconductivity, Vol. 10, No. 4, 08.1997, p. 461-466.

    Research output: Contribution to journalArticle

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