Possible orbital-ordered state in the highly-correlated electronic material Sr1-xCexMnO3

Takehiro Hanaoka, Yasuhide Inoue, Yasumasa Koyama

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

    Abstract

    The simple perovskite manganite Sr1-xCexMnO3 (SCMO) has a highly-correlated electronic system with a three-dimensional character. Because the presence of orbital-ordered states of eg electrons can be expected in SCMO, the crystallographic features of SCMO samples with 0.09 ≤ x ≤ 0.20 have been investigated mainly by transmission electron microscopy. In addition to fundamental reflections due to the simple perovskite structure, their electron diffraction patterns at room temperature exhibited both the presence of superlattice reflections at in the cubic notation and the splitting of fundamental and superlattice reflections. The careful analysis of these reflections indicated that the superlattice reflections originated from the R25-type rotational displacement of oxygen octahedra about one of the <100>c directions. On the other hand, the splitting of the reflections was found to be due to a {110}c banded structure consisting of two tetragonal bands with different c/a values. Because one of two tetragonal bands had the c/a value of about 1.028, the splitting reflects the introduction of the Jahn-Teller distortion as a response of a lattice system to orbital ordering. It is thus understood that the C-type orbital ordering of eg electrons should be involved in the state at room temperature for 0.09 ≤ x ≤ 0.20 in SCMO.

    Original languageEnglish
    Title of host publicationAdvanced Materials Research
    PublisherTrans Tech Publications
    Pages230-236
    Number of pages7
    Volume922
    ISBN (Print)9783038350743
    DOIs
    Publication statusPublished - 2014
    Event8th International Conference on Processing and Manufacturing of Advanced Materials: Processing, Fabrication, Properties, Applications, THERMEC 2013 - Las Vegas, NV
    Duration: 2013 Dec 22013 Dec 6

    Publication series

    NameAdvanced Materials Research
    Volume922
    ISSN (Print)10226680

    Other

    Other8th International Conference on Processing and Manufacturing of Advanced Materials: Processing, Fabrication, Properties, Applications, THERMEC 2013
    CityLas Vegas, NV
    Period13/12/213/12/6

    Fingerprint

    Perovskite
    Jahn-Teller effect
    Electrons
    Electron diffraction
    Crystal lattices
    Diffraction patterns
    Transmission electron microscopy
    Temperature
    Oxygen

    Keywords

    • C-type orbital ordering
    • Jahn-teller distortion
    • Rotational displacement of oxygen octahedra
    • Transmission electron microscopy

    ASJC Scopus subject areas

    • Engineering(all)

    Cite this

    Hanaoka, T., Inoue, Y., & Koyama, Y. (2014). Possible orbital-ordered state in the highly-correlated electronic material Sr1-xCexMnO3 In Advanced Materials Research (Vol. 922, pp. 230-236). (Advanced Materials Research; Vol. 922). Trans Tech Publications. https://doi.org/10.4028/www.scientific.net/AMR.922.230

    Possible orbital-ordered state in the highly-correlated electronic material Sr1-xCexMnO3 . / Hanaoka, Takehiro; Inoue, Yasuhide; Koyama, Yasumasa.

    Advanced Materials Research. Vol. 922 Trans Tech Publications, 2014. p. 230-236 (Advanced Materials Research; Vol. 922).

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

    Hanaoka, T, Inoue, Y & Koyama, Y 2014, Possible orbital-ordered state in the highly-correlated electronic material Sr1-xCexMnO3 in Advanced Materials Research. vol. 922, Advanced Materials Research, vol. 922, Trans Tech Publications, pp. 230-236, 8th International Conference on Processing and Manufacturing of Advanced Materials: Processing, Fabrication, Properties, Applications, THERMEC 2013, Las Vegas, NV, 13/12/2. https://doi.org/10.4028/www.scientific.net/AMR.922.230
    Hanaoka T, Inoue Y, Koyama Y. Possible orbital-ordered state in the highly-correlated electronic material Sr1-xCexMnO3 In Advanced Materials Research. Vol. 922. Trans Tech Publications. 2014. p. 230-236. (Advanced Materials Research). https://doi.org/10.4028/www.scientific.net/AMR.922.230
    Hanaoka, Takehiro ; Inoue, Yasuhide ; Koyama, Yasumasa. / Possible orbital-ordered state in the highly-correlated electronic material Sr1-xCexMnO3 Advanced Materials Research. Vol. 922 Trans Tech Publications, 2014. pp. 230-236 (Advanced Materials Research).
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