Heisenberg antiferromagnets with uniaxial exchange and cubic anisotropies in a field

TL;DR

This study investigates classical Heisenberg antiferromagnets with uniaxial and cubic anisotropies in a magnetic field, revealing complex phase diagrams and the role of non-collinear biconical structures through simulations.

Contribution

It provides new insights into the phase behavior of anisotropic antiferromagnets, highlighting the significance of biconical structures in their phase diagrams.

Findings

Identification of phase diagrams with multiple magnetic phases

Role of biconical structures in phase transitions

Comparison with previous theoretical and simulation results

Abstract

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