Local symmetry and crystalline field effects in charge-ordered Yb4As3

Osamu Sakai, Masahumi Kohgi, Hiroyuki Shiba, Akira Ochiai, Hidekazu Aoki, Katsuhiko Takegahara, Hisatomo Harima

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Yb4As3 exhibits very anisotropic magnetic properties, while its dynamic form factor of the inelastic excitation spectra at very low temperatures are well described by an almost-isotropic one-dimensional Heisenberg model, which is supplemented by the Dzyaloshinsky-Moriya interaction. To clarify the origin of this feature, the crystalline field effects in the inelastic neutron scattering and the magnetic susceptibility data of Yb4As3 are analyzed to separate cut the contribution of the lowest Kramers-doublet state from those of the crystalline field excited states. The isotropic excitation mode is ascribed to the former state. The excitation spectra specified by the magnetic polarization directions are also calculated to give additional information of the crystalline field states. It is also pointed out that the magnetization parallel to the c-axis is induced for the magnetic field, which is applied perpendicular to the c-axis in the c-plane. Its magnitude is proportional to the cube of the field strength. The internal field can have different values on the two Yb3+ sites which are connected by the glide operation. It is shown that the magnetization can give us detailed information of the local C3 symmetry around the Yb3+ site.

Original languageEnglish
Pages (from-to)3633-3641
Number of pages9
Journaljournal of the physical society of japan
Volume69
Issue number11
DOIs
Publication statusPublished - 2000 Nov

Keywords

  • C symmetry
  • Crystalline field effect
  • Magnetic excitation spectrum
  • Magnetization
  • YbAs

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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