High Field Magnetization of Tb Single Crystals

L. W. Roeland, G. J. Cock, Per-Anker Lindgård

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    Abstract

    The magnetization of Tb single crystals was measured in magnetic fields to 34T along the hard direction at temperature of 1.8, 4.2, 65.5 and 77K, and along with easy direction at 4.2 and 77K. The data are compared with the results of a self-consistent spin wave calculation using a phenomenological Hamiltonian including isotropic exchange interactions, effective single-ion anisotropy and magnetoelastic contributions. The parameters of this Hamiltonian were determined by fitting the theoretical results for the spin wave dispersion and energy gap as a function of temperature and magnetic field to existing data on Tb. The conduction-electron polarization at zero field and temperature is (0.33+or-0.05) mu B/ion, and the susceptibility is greater than the Pauli susceptibility calculated from the band-structure.
    Original languageEnglish
    JournalJOURNAL OF PHYSICS C-SOLID STATE PHYSICS
    Volume8
    Issue number20
    Pages (from-to)3427-3438
    ISSN0022-3719
    DOIs
    Publication statusPublished - 1975

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