Anisotropy of Dielectric Dispersion in ErFe2O4 Single Crystal

Naoshi Ikeda, Kay Kohn, Hijiri Kito, Jun Akimitsu, Kiiti Siratori

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Dielectric dispersion was observed in a single crystal with the composition of ErFe2O3.95 below magnetic transition temperature. It is characterized by a large dielectric constant of the order of 104, and a Debye-type frequency dependence like in the poly crystalline samples of the same substance which we reported in a previous paper. Large anisotropy exists in the strength εs − ε and the characteristic relaxation frequency of the dispersion. The strength is higher within the c-plane than along the c-axis, while the characteristic frequency is much larger along the c-axis than within the c-plane. The dielectric dispersion in the polycrystalline sample cannot be explained by a simple average of the single crystal results. The observed dispersion is qualitatively discussed with a model of domain wall motion on an assumption that ErFe2O4 is a polar crystal.

Original languageEnglish
Pages (from-to)1371-1377
Number of pages7
Journaljournal of the physical society of japan
Volume64
Issue number4
DOIs
Publication statusPublished - Apr 1995
Externally publishedYes

Keywords

  • ErFeO
  • RFeO
  • Verwey transition
  • dielectric relaxation
  • ferroelectric domain
  • magnetic domain

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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