Role of the tilting of oxygen octahedra in the stabilization of the orbital-modulated state in the layered perovskite manganite Ca2-xNdxMnO4

Yasuhide Inoue, Masazumi Arao, Ippei Tanaka, Yasumasa Koyama

研究成果: Conference contribution

抄録

There exists the orbital-modulated (OM) state in the layered manganite Ca2-xNdxMnO4 (CNMO) with 0.20 ≤ x ≤ 0.50. To understand the effect of the tilting of MnO6 octahedra to the stability of the OM state, the crystallographic features of CNMO samples prepared by a solid-state reaction have been investigated mainly by transmission electron microscopy. For 0.30 ≤ x ≤ 0.50, it was found that the (LTO → Pccn/LTT) structural transition occurred on cooling from room temperature, where the LTO and Pccn/LTT structures are, respectively, characterized by tilting displacements of oxygen octahedra about one and two of the <110> directions. The notable feature of the (LTO → Pccn/LTT) transition is that its progress strongly suppresses the growth of the OM state for 0.30 ≤ x ≤ 0.45. As a result of the suppression, the OM state exhibits a re-entrant behavior for its appearance. This is an indication that the Pccn/LTT tilting is not favorable for the stabilization of the OM state.

本文言語English
ホスト出版物のタイトルTHERMEC 2013
編集者B. Mishra, Mihail. Ionescu, T. Chandra
出版社Trans Tech Publications Ltd
ページ2065-2070
ページ数6
ISBN(印刷版)9783038350736
出版ステータスPublished - 2014 1 1
イベント8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013 - Las Vegas, NV, United States
継続期間: 2013 12 22013 12 6

出版物シリーズ

名前Materials Science Forum
783-786
ISSN(印刷版)0255-5476
ISSN(電子版)1662-9752

Conference

Conference8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013
CountryUnited States
CityLas Vegas, NV
Period13/12/213/12/6

ASJC Scopus subject areas

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

フィンガープリント 「Role of the tilting of oxygen octahedra in the stabilization of the orbital-modulated state in the layered perovskite manganite Ca<sub>2-x</sub>Nd<sub>x</sub>MnO<sub>4</sub>」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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