Heisenberg antiferromagnets with uniaxial exchange and cubic anisotropies in a field

Bannasch, G., Selke, W.
Institut für Theoretische Physik, Technische Hochschule Aachen,
D-52056 Aachen, Germany

Abstract:

Classical Heisenberg antiferromagnets with uniaxial exchange anisotropy and a cubic anisotropy term in a field on simple cubic lattices a re studied with the help of ground state considerations and extensive Monte Carlo simulations. Especially, we analyze the role of non--collinear structures of biconical type occurring in addition to the well--known antiferromagnetic and spin--flop structures. Pertinent phase diagrams are determined, and compared to previous findings.


cond-mat/0807.1019