Stability of the orbital-modulated state in the layered perovskite manganite Sr2-xRxMnO4 (R = Pr, Nd)

Yasuhide Inoue, Masazumi Arao, Go Shindo, Yasumasa Koyama

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    4 Citations (Scopus)

    Abstract

    To understand a stability of the orbital-modulated (OM) state in Sr 2-xRxMnO4 (R = Pr, Nd), the crystallographic features of oxide samples with 0.20 < x ≤ 0.50, prepared by the coprecipitation technique, have been investigated by transmission electron microscopy. When the Pr content x corresponding to the eg-electron concentration increased from x = 0, the OM state appeared in 0.20 < x ≤ 0.40 as a neighboring state of an orbital ordered (OO) state around x = 0.20. The interesting features are that around x = 0.44 there is a nanometer-sized coexisting state consisting of the OM and disordered tetragonal (DT) states, and that an average size of OM-state regions in the coexisting state decreases with increasing the eg-electron concentration. In addition, the so-called CE-type antiferromagnetic state found in Sr1.5La 0.5MnO4 is absent in the Nd and Pr cases. This suggests that the stability of the OM state is not directly associated with charge ordering of eg electrons, but basically due to only their orbital ordering.

    Original languageEnglish
    Title of host publicationMaterials Science Forum
    Pages1760-1765
    Number of pages6
    Volume638-642
    DOIs
    Publication statusPublished - 2010
    Event6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009 - Berlin
    Duration: 2009 Aug 252009 Aug 29

    Publication series

    NameMaterials Science Forum
    Volume638-642
    ISSN (Print)02555476

    Other

    Other6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009
    CityBerlin
    Period09/8/2509/8/29

    Fingerprint

    Perovskite
    orbitals
    Electrons
    Coprecipitation
    Oxides
    Transmission electron microscopy
    electrons
    manganite
    perovskite
    transmission electron microscopy
    oxides

    Keywords

    • Layered perovskite
    • Manganite
    • Orbital modulation
    • Transmission electron microscopy

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanical Engineering
    • Mechanics of Materials

    Cite this

    Inoue, Y., Arao, M., Shindo, G., & Koyama, Y. (2010). Stability of the orbital-modulated state in the layered perovskite manganite Sr2-xRxMnO4 (R = Pr, Nd). In Materials Science Forum (Vol. 638-642, pp. 1760-1765). (Materials Science Forum; Vol. 638-642). https://doi.org/10.4028/www.scientific.net/MSF.638-642.1760

    Stability of the orbital-modulated state in the layered perovskite manganite Sr2-xRxMnO4 (R = Pr, Nd). / Inoue, Yasuhide; Arao, Masazumi; Shindo, Go; Koyama, Yasumasa.

    Materials Science Forum. Vol. 638-642 2010. p. 1760-1765 (Materials Science Forum; Vol. 638-642).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Inoue, Y, Arao, M, Shindo, G & Koyama, Y 2010, Stability of the orbital-modulated state in the layered perovskite manganite Sr2-xRxMnO4 (R = Pr, Nd). in Materials Science Forum. vol. 638-642, Materials Science Forum, vol. 638-642, pp. 1760-1765, 6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009, Berlin, 09/8/25. https://doi.org/10.4028/www.scientific.net/MSF.638-642.1760
    Inoue Y, Arao M, Shindo G, Koyama Y. Stability of the orbital-modulated state in the layered perovskite manganite Sr2-xRxMnO4 (R = Pr, Nd). In Materials Science Forum. Vol. 638-642. 2010. p. 1760-1765. (Materials Science Forum). https://doi.org/10.4028/www.scientific.net/MSF.638-642.1760
    Inoue, Yasuhide ; Arao, Masazumi ; Shindo, Go ; Koyama, Yasumasa. / Stability of the orbital-modulated state in the layered perovskite manganite Sr2-xRxMnO4 (R = Pr, Nd). Materials Science Forum. Vol. 638-642 2010. pp. 1760-1765 (Materials Science Forum).
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