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

Takehiro Hanaoka, Yasuhide Inoue, Yasumasa Koyama

研究成果: Conference contribution

抄録

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.

本文言語English
ホスト出版物のタイトルTHERMEC 2013 Supplement
出版社Trans Tech Publications
ページ230-236
ページ数7
ISBN(印刷版)9783038350743
DOI
出版ステータスPublished - 2014
イベント8th International Conference on Processing and Manufacturing of Advanced Materials: Processing, Fabrication, Properties, Applications, 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Advanced Materials Research
922
ISSN(印刷版)1022-6680

Conference

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

ASJC Scopus subject areas

  • Engineering(all)

フィンガープリント 「Possible orbital-ordered state in the highly-correlated electronic material Sr<sub>1-x</sub>Ce<sub>x</sub>MnO<sub>3</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。

引用スタイル