Synchrotron X-ray powder diffraction and convergent beam electron diffraction studies on the cubic phase of MgV2O4 spinel

Seiji Niitaka, Soyeon Lee, Yoshifumi Oshima, Kenichi Kato, Daisuke Hashizume, Masaki Takata, Hidenori Takagi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The A V2O4 (A=Mg2+, Zn2+, Cd2+) spinels are three-dimensional spin-1 frustrated systems with orbital degree of freedom, which have been known to possess intriguing orbital states causing releases of spin frustration at low temperatures. We have performed synchrotron X-ray and convergent beam electron diffraction measurements for one of these vanadates, MgV2O4 in order to clarify its crystal structure in the high temperature cubic phase, which is regarded as an important starting point for understanding the details of the low temperature phase. We have successfully observed that the [001] zone axis convergent beam electron diffraction pattern exhibits 4mm symmetry, suggesting the space group of Fd3̄m in the cubic MgV2O4. It has also been demonstrated that the crystal structure of the cubic MgV 2O4 contains VO6 octahedra elongated along the threefold rotation axis. Based on our results, we discuss the orbital states of MgV2O4 as well as the other spinel vanadates.

Original languageEnglish
Pages (from-to)184-188
Number of pages5
JournalJournal of Solid State Chemistry
Volume215
DOIs
Publication statusPublished - 2014 Jul
Externally publishedYes

Keywords

  • Convergent beam electron diffraction
  • Crystal structure analysis
  • Spinel
  • Synchrotron X-ray diffraction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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