Faraday effect and magnetic circular dichroism in cubic magnets with orbitally degenerate mixed-valence centers

M. A. Ivanov, V. Ya Mitrofanov, L. D. Fal'kovskaya, A. Ya Fishman, B. S. Tsukerblat

Research output: Contribution to journalArticlepeer-review

Abstract

The behavior of the dynamic dielectric permittivity tensor of magnetic crystals with Jahn-Teller impurity centers in the form of clusters of mixed-valence 3d-ions is investigated. Owing to the coexistence of the dipole moment and the unquenched orbital angular momentum, such clusters can lead to an anomalous increase in the antisymmetric components of the tensor and therefore produce the Faraday effect and magnetic circular dichroism. These effects also occur in an unaccustomed frequency range for the "dielectric" contribution: the infrared and far infrared. It is shown that the investigated spectra of the Faraday effect and magnetic circular dichroism are highly anisotropic and depend strongly on the dispersion of the random crystal fields by the Jahn-Teller clusters.

Original languageEnglish
Pages (from-to)1978-1984
Number of pages7
JournalPhysics of the Solid State
Volume38
Issue number12
StatePublished - 1 Dec 1996
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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