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2012 Fiscal Year Final Research Report

Development of electron resonance inelastic scattering and its application to orbital order analysis of perovskite manganese oxides

Research Project

  • PDF
Project/Area Number 23654117
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Condensed matter physics II
Research InstitutionNagoya University

Principal Investigator

SAITOH Koh  名古屋大学, エコトピア科学研究所, 准教授 (50292280)

Project Period (FY) 2011 – 2012
Keywords強相関系 / 電荷・軌道秩序 / ペロブスカイトMn酸化物 / 電子線非弾性散乱 / 電子エネルギー損失分光
Research Abstract

The present research study is aimed to develop a method to analyze the orbital order of d-electrons in strongly-correlated electron systems by inelastic scattering accompanied by inner-shell excitation and to apply the method to Mn-perovskite oxides, which show a variety of electronic properties such as high-temperature superconductivity, giant magnetoresistivity, etc. The following results are obtained. (1)The space group of Nd0.5Sr0.5MnO3is determined to be Pmnmby convergent-beam electron diffraction. (2)The hole state of Nd0.5Sr0.5MnO3shows significant anisotropy in inelastic scattering patterns accompanied by Mn-Lshell excitation. Two kinds of anisotropies are observed, one of which is consistent to the CE type orbital-order model, whereas the other is inconsistent to the model. A new model of the orbital order is proposed on the basis of the space group of Pmnmand the inelastic scattering anisotropy.

  • Research Products

    (6 results)

All 2012 2011

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (4 results)

  • [Journal Article] Observation of the hole state symmetry of MgB2by inelastic scattering of fast electrons accompanied by boron K-shell excitation2012

    • Author(s)
      K. Saitoh, K. Momonoi, N. Tanaka, and S. Onari
    • Journal Title

      Journal of Applied Physics 112

      Pages: 113920

    • Peer Reviewed
  • [Journal Article] 内殻励起をともなう非弾性散乱をもちいた電子構造異方性解析2012

    • Author(s)
      齋藤 晃
    • Journal Title

      顕微鏡

      Volume: 47 Pages: 228-237

    • Peer Reviewed
  • [Presentation] 収束電子回折法をもちいたNd0.5Sr0.5MnO3の空間群決定2012

    • Author(s)
      十朱洋平、齋藤晃、田中信夫、竹中康司
    • Organizer
      本結晶学会年会
    • Place of Presentation
      東北大学片平キャンパス.
    • Year and Date
      2012-10-26
  • [Presentation] 収束電子回折法をもちいたNd0.5Sr0.5MnO3の空間群決定2012

    • Author(s)
      十朱洋平、齋藤晃、田中信夫、竹中康司
    • Organizer
      日本物理学会2012年秋季大会
    • Place of Presentation
      横浜国立大学常盤台キャンパス.
    • Year and Date
      2012-09-21
  • [Presentation] Observation of the Hole State Symmetry by Anisotropy of Inelastic Scattering Accompanied by Inner-Shell Excitation2011

    • Author(s)
      K. Saitoh, K. Momonoi, and N. Tanaka
    • Organizer
      Microscopy and Microanalysis
    • Place of Presentation
      Nashville Tennessee USA
    • Year and Date
      2011-08-11
  • [Presentation] 内殻励起をともなう電子線非弾性散乱のNd0.5Sr0.5MnO3の軌道秩序の観察2011

    • Author(s)
      桃井浩太、齋藤晃、田中信夫
    • Organizer
      日本顕微鏡学会第67回学術講演会
    • Place of Presentation
      福岡
    • Year and Date
      2011-05-18

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Published: 2014-09-25  

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