Surface anisotropy in nanomagnets: transverse or N\'eel ?
Materials Science
2009-11-10 v2 Statistical Mechanics
Abstract
Through the hysteresis loop and magnetization spatial distribution we study and compare two models for surface anisotropy in nanomagnets: a model with transverse anisotropy axes and N\'eel's model. While surface anisotropy in the transverse model induces several jumps in the hysteresis loop because of the cluster-wise switching of spins, in the N\'eel model the jumps correspond to successive {\it coherent partial rotations} of the whole bunch of spins. These calculations together with experimental results suggest that N\'eel's model for surface anisotropy is more appropriate.
Keywords
Cite
@article{arxiv.cond-mat/0307436,
title = {Surface anisotropy in nanomagnets: transverse or N\'eel ?},
author = {H. Kachkachi and H. Mahboub},
journal= {arXiv preprint arXiv:cond-mat/0307436},
year = {2009}
}
Comments
12 pages, 6 eps figures