Biquadratic Exchange in CsMnxMg1-xBr3

U. Falk, A. Furrer, Jørgen Kjems, H. U. Güdel

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    Abstract

    The importance of higher-order exchange interaction in localized S-state systems is discussed. The equation of motion is solved for a one-dimensional antiferromagnet with bilinear and biquadratic exchange coupling. It is shown that the biquadratic exchange interaction usually cannot be derived from the observed spin-wave dispersion, but is susceptible to experimental determination from the excitation spectra of small clusters of magnetic ions as exemplified for CsMnxMg1-xBr3 by inelastic neutron scattering.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume52
    Issue number15
    Pages (from-to)1336-1339
    ISSN0031-9007
    DOIs
    Publication statusPublished - 1984

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