Temperature Dependence of the Spin Waves in ErFe2

K. Clausen, J. J. Rhyne, Bente Lebech, N. C. Koon

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The temperature renormalisation of the energies of the optic modes in ErFe2 has been determined from room temperature up to close to the Curie temperature (574K). It is found that the two modes, a dispersive transition-metal mode and a localised crystal-field-dominated mode, cross over at about 420K. The experimental results have been interpreted and are well accounted for by a linear spin wave model, where the level scheme of the lowest J multiplet of the Er3+ site has been assumed to consist of pure Jz states with an equidistant energy spacing between the levels.
    Original languageEnglish
    JournalJOURNAL OF PHYSICS C-SOLID STATE PHYSICS
    Volume15
    Issue number16
    Pages (from-to)3587-3596
    ISSN0022-3719
    DOIs
    Publication statusPublished - 1982

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