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
Classical Heisenberg antiferromagnets with uniaxial exchange
anisotropy and a cubic anisotropy term in a field on simple cubic lattices a
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.