Magnetic Properties of Nd-Group V Compounds

Poul Erik Bak, Per-Anker Lindgård

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The Nd monopnictides NdP, NdAs and NdSb are simple cubic type I antiferromagnets in which the crystal-field splitting is larger than the exchange energy. The magnetic properties are calculated by means of a mean-field theory including crystal-field and magnetoelastic effects. The calculations are based on energy levels determined by inelastic neutron diffraction. Exchange constants are derived by comparing the theoretical paramagnetic susceptibility with experiments over a large temperature range. The temperature dependence of the sublattice magnetization deviates significantly from the usual molecular field curve (for J=9/2) which neglects crystal-field effects. Theoretical high-field magnetization curves are presented. The observed tetragonal distortion below the Neel temperature TN is explained by the theory. The effect of biquadratic exchange interaction is investigated.
    Original languageEnglish
    JournalJOURNAL OF PHYSICS C-SOLID STATE PHYSICS
    Volume6
    Issue number24
    Pages (from-to)3774-3784
    ISSN0022-3719
    DOIs
    Publication statusPublished - 1973

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