Title: Magnetic excitations in Ho<sub>2</sub>Co<sub>17</sub>and Ho<sub>2</sub>Fe<sub>17</sub>
Abstract: The low-energy part (<20 meV) of the ground-state magnetic excitation spectra of Ho2Co17 and Ho2Fe17 were found to consist of three modes: (i) a highly dispersive transition-metal mode; (ii) a non-dispersive local mode and (iii) a weakly dispersive mode degenerate with the local mode at the zone boundary. These modes are interpreted within the linear spin wave formalism, using a two-sublattice approximation for the magnetic structure, and taking isotropic exchange and single-ion crystal-field interactions into account. The exchange constants, the anisotropy of the transition-metal sublattice and two linear combinations of the rare-earth crystal-field parameters B20, B40, B60 and B66 are determined by fitting the linear spin wave solution to the observed dispersion relations.
Publication Year: 1982
Publication Date: 1982-08-30
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 41
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