Hartree-Fock renormalization of magnetic anisotropy in the basal-plane ferromagnets terbium and dysprosium
- 7 September 1975
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 8 (17), 2769-2780
- https://doi.org/10.1088/0022-3719/8/17/017
Abstract
The application of the Holstein-Primakoff transformation in the spin-wave theory of an anisotropic ferromagnet implies contributions from the isotropic two-ion coupling to the energy of the uniform spin-wave mode. Including these contributions, the energies of the HF renormalized spin waves are deduced using the method of Lindgard and Danielsen (1974). The macroscopic resonance theory for the uniform mode is found to agree with the spin-wave theory if the magnetization is along a symmetry direction. Numerical results for the renormalization of the static anisotropy parameters of Tb and Dy are presented. The effect of the ellipticity of the moment precession is found to be smaller than reported previously.Keywords
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