Monte Carlo Study of Mixed-Spin S=(1/2,1) Ising Ferrimagnets
Materials Science
2011-11-24 v1
Abstract
We investigate Ising ferrimagnets on square and simple-cubic lattices with exchange couplings between spins of values S=1/2 and S=1 on neighbouring sites and an additional single-site anisotropy term on the S=1 sites. Based mainly on a careful and comprehensive Monte Carlo study, we conclude that there is no tricritical point in the two--dimensional case, in contradiction to mean-field predictions and recent series results. However, evidence for a tricritical point is found in the three-dimensional case. In addition, a line of compensation points is found for the simple-cubic, but not for the square lattice.
Keywords
Cite
@article{arxiv.0910.2377,
title = {Monte Carlo Study of Mixed-Spin S=(1/2,1) Ising Ferrimagnets},
author = {W. Selke J. Oitmaa},
journal= {arXiv preprint arXiv:0910.2377},
year = {2011}
}
Comments
14 pages, 11 figures