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

M. Arao*, Y. Koyama

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)300-305
Number of pages6
JournalPhysica C: Superconductivity and its applications
Issue numberPART 1
Publication statusPublished - 2003 Oct
EventProceedings of the 15th International Symposium on Superconduc - Yokohama, Japan
Duration: 2002 Nov 112002 Nov 13


  • Jahn-Teller atomic displacement
  • Jahn-Teller lattice distortion
  • RTiO (R: rare-earth ion)
  • Structural phase transition
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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