Neutron inelastic scattering study of rare-earth orthoferrite HoFeO3

Authors:
A.K. Ovsyanikov, I.A. Zobkalo, W. Schmidt, S.N. Barilo, S.A. Guretskii, V. Hutanu
The year of the publication:
2020
Journal:
Journal of Magnetism and Magnetic Materials vol. 507 166855
Abstract:

By the single crystal inelastic neutron scattering the orthoferrite HoFeO3 was studied. We show that the spin dynamics of the Fe subsystem does not change through the spin-reorientation transitions. The observed spectrum of magnetic excitations was analyzed in the frames of linear spin-wave theory. Within this approach the antiferromagnetic exchange interactions of nearest neighbors and next nearest neighbors were obtained for Fe subsystem. Parameters of Dzyaloshinskii-Moriya interactions at Fe subsystem were refined. The temperature dependence of the gap in Fe spin-wave spectrum indicates the temperature evolution of the anisotropy parameters. The estimations for the values of Fe-Ho and Ho-Ho exchange interaction were made as well.

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