Structural modulation induced by the incommensurate antiferromagnetic phase transition in ZnCr2Se4

M. Hidaka, M. Yoshimura, N. Tokiwa, J. Akimitsu, Yong Jun Park, Jae Hyun Park, Sung Dae Ji, Ki Bong Lee

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The structural properties of normal-type spinel ZnCr2Se4 have been studied as a function of temperature by means of X-ray diffraction using synchrotron radiation. It is found that a structural phase transition from cubic to orthorhombic symmetry occurs at 22.5 K (Tc). It is also found that, below Tc, Se ions are cooperatively displaced in a pseudo-tetragonal (001) plane. Since the Cr3+ ion has no orbital angular momentum, a CrSe6 octahedron is not distorted by a crystal field produced by surrounding Se2- anions. It is interpreted that the pseudo-tetragonal displacements of Se ions are induced by magnetostriction among Cr3- ions in CrSe2 chains, in which Cr ions share two Se2- with each other along 〈110〉.

Original languageEnglish
Pages (from-to)570-577
Number of pages8
JournalPhysica Status Solidi (B) Basic Research
Volume236
Issue number3
DOIs
Publication statusPublished - Apr 1 2003
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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