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

Yasuhide Inoue, Masazumi Arao, Go Shindo, Yasumasa Koyama

研究成果: Conference contribution

4 被引用数 (Scopus)

抄録

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.

本文言語English
ホスト出版物のタイトルTHERMEC 2009
編集者Tara Chandra, Tara Chandra, Tara Chandra, N. Wanderka, N. Wanderka, N. Wanderka, Walter Reimers, Walter Reimers, Walter Reimers, M. Ionescu, M. Ionescu, M. Ionescu
出版社Trans Tech Publications Ltd
ページ1760-1765
ページ数6
ISBN(印刷版)0878492941, 9780878492947
DOI
出版ステータスPublished - 2010
イベント6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009 - Berlin, Germany
継続期間: 2009 8 252009 8 29

出版物シリーズ

名前Materials Science Forum
638-642
ISSN(印刷版)0255-5476
ISSN(電子版)1662-9752

Conference

Conference6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009
国/地域Germany
CityBerlin
Period09/8/2509/8/29

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

フィンガープリント

「Stability of the orbital-modulated state in the layered perovskite manganite Sr<sub>2-x</sub>R<sub>x</sub>MnO<sub>4</sub> (R = Pr, Nd)」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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