Diffuse phase transition and anisotropic evolution of nanodomains in Nd 0.2Sr 0.8MnO 3

Masahiro Nagao, Toru Asaka, Takuro Nagai, Daisuke Akahoshi, Ryota Hatakeyama, Tadahiro Yokosawa, Masahiko Tanaka, Hideki Yoshikawa, Atsushi Yamazaki, Koji Kimoto, Hideki Kuwahara, Yoshio Matsui

研究成果: Article査読

3 被引用数 (Scopus)

抄録

We investigated the crystal structures of single-crystal Nd 0.2Sr 0.8MnO 3 by means of synchrotron x-ray diffraction measurement and transmission electron microscopy. We observed the coexistence of distinct crystal-structural phases, i.e., tetragonal (orbital ordered) and cubic (orbital disordered) phases, over a significantly wide range of temperatures. The ratio of these phases varied continuously with temperature. These indicate that the crystal exhibits a diffuse phase transition of the 3z 2 - r 2-type orbital ordering. Moreover, we observed the anisotropic evolution of the orbital-ordered nanodomains in the cubic phase. This specific nature of the phase transition probably originates from the competition between the orbital order and disorder.

本文言語English
論文番号103706
ジャーナルjournal of the physical society of japan
76
10
DOI
出版ステータスPublished - 2007 10

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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