Domain-wall free energy in Heisenberg ferromagnets
Mesoscale and Nanoscale Physics
2014-02-04 v1 Statistical Mechanics
Abstract
We consider Gaussian fluctuations about domain walls embedded in one- or two-dimensional spin lattices. Analytic expressions for the free energy of one domain wall are obtained. From these, the temperature dependence of experimentally relevant spatial scales -- i.e., the correlation length for spin chains and the size of magnetic domains for thin films magnetized out of plane -- are deduced. Stability of chiral order inside domain walls against thermal fluctuations is also discussed.
Keywords
Cite
@article{arxiv.1308.3984,
title = {Domain-wall free energy in Heisenberg ferromagnets},
author = {Boris Sangiorgio and Thomas C. T. Michaels and Danilo Pescia and Alessandro Vindigni},
journal= {arXiv preprint arXiv:1308.3984},
year = {2014}
}
Comments
20 pages, 7 figures