Eur. Phys. J. Special Topics 226, 779-788 (2017)
https://doi.org/10.1140/epjst/e2016-60235-9

Regular Article

Anisotropic XY antiferromagnets in a field

Institute for Theoretical Solid State Physics, RWTH Aachen University, 52056 Aachen, Germany

^a e-mail: selke@physik.rwth-aachen.de

Received: 12 September 2016
Revised: 14 October 2016
Published online: 5 April 2017

Abstract

Classical anisotropic XY antiferromagnets in a field on square and simple cubic lattices are studied using mainly Monte Carlo simulations. While in two dimensions the ordered antiferromagnetic and spin-flop phases are observed to be separated by a narrow disordered phase, a line of direct transitions of first order between the two phases and a bicritical point are found in three dimensions. Results are compared to previous findings.