Spin waves in the oblique antiferromagnetic phase of K 2 Co x Fe 1-x F 4 : a mixed magnetic system with competing spin anisotropies

The spin waves in the d=2 mixed antiferromagnet K 2 Co x Fe 1-x F 4 have been investigated using inelastic neutron scattering for a sample with a concentration x=0.27. K 2 Co x Fe 1-x F 4 is a system with competing orthogonal spin anisotropies and for temperatures below T L =27+or-2 K the x=0.27 sam...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. C, Solid state physics Solid state physics, 1987-02, Vol.20 (6), p.833-840
Main Authors: S A Higgins, W A H M Vlak, M Hagen, R A Cowley, A F M Arts, H W de Wijn
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The spin waves in the d=2 mixed antiferromagnet K 2 Co x Fe 1-x F 4 have been investigated using inelastic neutron scattering for a sample with a concentration x=0.27. K 2 Co x Fe 1-x F 4 is a system with competing orthogonal spin anisotropies and for temperatures below T L =27+or-2 K the x=0.27 sample is in the oblique antiferromagnetic (OAF) phase. Emphasis has been placed on the low-temperature spin wave dispersion relation which is revealed to have at least two low-frequency branches, and on the effect of temperature on the lower of these branches at small reduced wave-vector as the temperature approaches T L from below.
ISSN:0022-3719
DOI:10.1088/0022-3719/20/6/006