Memory in nanomagnetic systems: Superparamagnetism versus Spinglass behavior
统计力学
2009-11-11 v1
摘要
The slow dynamics and concomitant memory (aging) effects seen in nanomagnetic systems are analyzed on the basis of two separate paradigms : superparamagnets and spinglasses. It is argued that in a large class of aging phenomena it suffices to invoke superparamagnetic relaxation of individual single domain particles but with a distribution of their sizes. Cases in which interactions and randomness are important in view of distinctive experimental signatures, are also discussed.
引用
@article{arxiv.cond-mat/0606233,
title = {Memory in nanomagnetic systems: Superparamagnetism versus Spinglass behavior},
author = {Malay Bandyopadhyay and Sushanta Dattagupta},
journal= {arXiv preprint arXiv:cond-mat/0606233},
year = {2009}
}
备注
11 pages and 19 figures