No Giant Two-Ion Anisotropy in the Heavy-Rare-Earth Metals

Per-Anker Lindgård

    Research output: Contribution to journalJournal articleResearchpeer-review


    A new Bose-operator expansion of tensor operators is applied to the heavy-rare-earth metals. The Er data for the cone phase have been analyzed successfully with single-ion anisotropy and isotropic exchange interaction. The Tb data can be understood on the same basis. The previously found large two-ion anisotropy was due to an inadequate treatment of the large single-ion anisotropy leading to an incorrect expression for the spin-wave energy.
    Original languageEnglish
    JournalPhysical Review Letters
    Issue number7
    Pages (from-to)385-388
    Publication statusPublished - 1976


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