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Spin‐Wave Resonance in the Thin FeBr 2 Field‐Induced Metamagnet with Modified Surface Exchange Interactions
Author(s) -
Rudziński W.
Publication year - 1999
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/(sici)1521-3951(199902)211:2<801::aid-pssb801>3.0.co;2-5
Subject(s) - antiferromagnetism , condensed matter physics , spin wave , resonance (particle physics) , spin (aerodynamics) , ferromagnetism , anisotropy , ferromagnetic resonance , exchange interaction , field (mathematics) , materials science , spin structure , absorption (acoustics) , coupling (piping) , paramagnetism , magnetic field , physics , magnetization , atomic physics , optics , quantum mechanics , pure mathematics , metallurgy , composite material , thermodynamics , mathematics
The spin‐wave resonance spectrum is calculated for the thin film of an FeBr 2 field‐induced metamagnet, which consists of ferromagnetically ordered layers parallel to the (001)‐plane, with intralayer ferromagnetic exchange coupling, interlayer antiferromagnetic exchange coupling as well as a strong three‐ion anisotropy. The profiles of the spin‐wave modes, the positions of the absorption lines and their intensities are analysed for standing spin waves existing in the paramagnetic phase of the FeBr 2 metamagnet at low temperatures. It is found that the absorption spectrum is strongly affected by modifications of both surface exchange parameters. By allowing the surface parameters to deviate from the bulk values, the full richness of spin‐wave resonance spectra is displayed. Also, the conditions for the appearance of various surface and bulk spin‐wave features are discussed.