Features of electronic states in the highly-correlated electronic system Sr1-xNdxMnO3 around x = 0.50

Rina Shimasaki, Ayumi Shiratani, Hiroki Sato, Yasuhide Inoue, Yasumasa Koyama

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

    2 Citations (Scopus)

    Abstract

    In the highly-correlated electron system Sr1-xNdxMnO3(SNMO) having the simple perovskite structure, there are interesting electronic states, which are related to degrees of charge, orbital, and spin freedoms for eg electrons in Mn ions. Among these states, in the case of SNMO, the C-, A- and CE-type antiferromagnetic states were reported for 0.20 ≤ x ≤ 0.38, for 0.38 ≤ x ≤ 0.48, and for 0.48 ≤ x ≤ 0.52, respectively. The points to note here are that these antiferromagnetic states are directly associated with corresponding orbital orderings, and that the CE-type state also accompanies charge ordering. Because of these features, we were interested in the (A → CE) state change in SNMO. The crystallographic features of prepared SNMO samples with 0.46 ≤ x ≤ 0.50 have thus been investigated mainly by means of a transmission electron microscope equipped with a low-temperature holder. As a result, the state around 100 K for x = 0.48 was first understood to be identified as the Imma state, which includes a large number of orbital-modulated (OM) regions with an average size of about 10 nm. The feature of such regions is that the orbital modulation has an incommensurate periodicity and a charge modulation is absent in them. On the other hand, the CE-type state having the commensurate orbital and charge modulations was also confirmed to be present for x = 0.50. In addition to these two states, the state around 100 K for x = 0.46 was found to be characterized by the coexistence state consisting of the C-type orbital-ordered state and the Imma states including OM regions. In other words, the presence of the A-type orbital-ordered state could not be confirmed in the temperature range between 300 K and about 100 K for 0.46 ≤ x ≤ 0.50 in this study.

    Original languageEnglish
    Title of host publicationTHERMEC 2016
    PublisherTrans Tech Publications Ltd
    Pages1766-1771
    Number of pages6
    Volume879
    ISBN (Print)9783035711295
    DOIs
    Publication statusPublished - 2017
    Event9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016 - Graz, Austria
    Duration: 2016 May 292016 Jun 3

    Publication series

    NameMaterials Science Forum
    Volume879
    ISSN (Print)02555476

    Other

    Other9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016
    CountryAustria
    CityGraz
    Period16/5/2916/6/3

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    Keywords

    • CE-type state
    • Highly-correlated electronic system
    • Orbital modulation
    • Simple-perovskite manganite
    • SrNdMnO
    • Transmission electron microscopy

    ASJC Scopus subject areas

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

    Cite this

    Shimasaki, R., Shiratani, A., Sato, H., Inoue, Y., & Koyama, Y. (2017). Features of electronic states in the highly-correlated electronic system Sr1-xNdxMnO3 around x = 0.50. In THERMEC 2016 (Vol. 879, pp. 1766-1771). (Materials Science Forum; Vol. 879). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/MSF.879.1766