THE INFLUENCE OF BIQUADRATIC COUPLING AND UNIAXIAL ANISOTROPY ON THE SURFACE-MODES IN A SIMPLE CUBIC ANTIFERROMAGNET

Authors
PAVKOV M SKRINJAR M STOJANOVIC S KAPOR D
Citation
M. Pavkov et al., THE INFLUENCE OF BIQUADRATIC COUPLING AND UNIAXIAL ANISOTROPY ON THE SURFACE-MODES IN A SIMPLE CUBIC ANTIFERROMAGNET, Physics letters. A, 236(1-2), 1997, pp. 148-158
Citations number
22
Categorie Soggetti
Physics
Journal title
Physics letters. A → ACNP
ISSN journal
03759601
Volume
236
Issue
1-2
Year of publication
1997
Pages
148 - 158
Database
ISI
SICI code
0375-9601(1997)236:1-2<148:TIOBCA>2.0.ZU;2-1
Abstract
We study the surface spin excitations in a simple cubic two-sublattice Heisenberg antiferromagnet with both biquadratic coupling (a) and uni axial anisotropy (D, D-S). The combined effect is a lowering or narrow ing of the energies, and changes of the range of the system parameters for which these modes can exist. For certain values of the system par ameters, the surface antiferromagnetic resonance (SAFMR) mode at the B rillouin zone center can be well resolved from the bulk AFMR mode. (C) 1997 Elsevier Science B.V.