Neutron-scattering study of the randomly mixed antiferromagnet with competing anisotropies K2CoxFe1-xF4
- 10 October 1983
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 16 (28) , L1015-L1020
- https://doi.org/10.1088/0022-3719/16/28/006
Abstract
The phase diagram of the two-dimensional (2D) randomly mixed antiferromagnet with orthogonal competing anisotropies K2CoxFe1-xF4 has been examined with elastic neutron scattering, in particular for x=0.27. For this composition the system supports long-range order of the axial spin components in 3D below a regular second-order transition at TN=64.4+or-0.6K. The transverse components also order below TN, but in 2D and over limited distances only. Below TL=27+or-2K the transverse components acquire 3D order by reorientation, establishing an oblique antiferromagnetic phase in four domains. The lower transition is first order.Keywords
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