Crystallographic features of RTiO3 (R: Rare-earth ion)

M. Arao, Y. Koyama

研究成果: Conference article査読

3 被引用数 (Scopus)

抄録

The crystallographic features of the simple perovskite oxides RTiO 3 with R = La, Nd, Sm and Y, which are known to be correlated-electron insulators, have been examined mainly at room temperature by transmission electron microscopy. Electron diffraction patterns indicated that the oxides with R=La and Nd have the space group Pbnm. In electron diffraction patterns of SmTiO3 and YTiO3, on the other hand, the twin splitting of reflections due to the Pbnm structure is seen along one of the 〈100〉c directions, where the subscript c denotes the cubic Brillouin zone. That is, it is understood that their crystal system is lowered from an orthorhombic one to a monoclinic one. The analysis of the patterns also suggested that the Jahn-Teller atomic displacement with q = 〈1/21/20〉c should be involved in the crystal structure for R = Sm and Y, in addition to the full symmetric Jahn-Teller lattice distortion in the structure for R = La and Nd.

本文言語English
ページ(範囲)300-305
ページ数6
ジャーナルPhysica C: Superconductivity and its applications
392-396
PART 1
DOI
出版ステータスPublished - 2003 10
イベントProceedings of the 15th International Symposium on Superconduc - Yokohama, Japan
継続期間: 2002 11 112002 11 13

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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