EFFECTS OF MAGNON-MAGNON INTERACTION ON THE TWO- MAGNON SPECTRA OF ANTIFERROMAGNETS

RJ ELLIOTT RJ, Michael Thorpe

Research output: Chapter in Book/Report/Conference proceedingChapter

177 Scopus citations

Abstract

Optical experiments have shown that the two-magnon spectra of antiferromagnets cannot be properly understood using simple noninteracting spin-wave theory. In these experiments two magnons are created close together in real space where they interact strongly to produce large observable effects. They therefore provide an excellent opportunity to study magnon-magnon interactions. A general theory of the two-magnon states using Green function methods is developed and the results applied to the spin-only antiferromagnet RbMnF//3 and to CoF//2 where the orbital contribution to the magnetic moment is important. The predicted optical properties are in good agreement with experiment.

Original languageEnglish (US)
Title of host publicationJ Phys C (Solid State Phys)
Pages1630-1643
Number of pages14
Volume2
Edition9
StatePublished - Sep 1969
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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