Dynamic phase transitions in thin ferromagnetic films
摘要
Monte Carlo simulations have been used to investigate the dynamic phase behavior of a classical Heisenberg spin system with a bilinear exchange anisotropy in a planar thin film geometry. Studies of the field amplitude, frequency and temperature dependence show dynamic phase transitions in films subject to a pulsed oscillatory external field. Thin films with competing surface fields show separate and distinct dynamic phase transitions for the bulk and surface layers of the film. Between the two transitions, a mixed state with coexisting dynamically ordered and dynamically disordered phases is observed in the film. In contrast, the free film with no surface fields shows a single dynamic phase transition as in a bulk system.
引用
@article{arxiv.cond-mat/0205070,
title = {Dynamic phase transitions in thin ferromagnetic films},
author = {Hyunbum Jang and Malcolm J. Grimson and Carol K. Hall},
journal= {arXiv preprint arXiv:cond-mat/0205070},
year = {2009}
}
备注
25 pages including figures in pdf format, to be published in PRB