학술논문
Low-temperature onset of the spin glass correlations in the ensemble of oriented Stoner–Wohlfarth nanoparticles.
Document Type
Article
Author
Source
Subject
*NANOPARTICLES
*SPIN glasses
*NUCLEAR spin
*STOCHASTIC processes
*ANISOTROPY
*
*
*
*
Language
ISSN
0021-8979
Abstract
We reveal the low-temperature anomaly in the temperature and angular dependencies of the coercivity in granular (CoFeB)x–(SiO2)1-x films with oriented in-plane anisotropy. Namely, at T<100 K the in-plane angular dependence of coercive field acquires two maxima corresponding to easy and hard (in a film plane) directions. This signifies the emergence of coercivity for hard direction in a film plane. The experimental results are explained in terms of a random field model, which describes the onset of spin glass-like correlations in the ensemble of oriented weakly interacting Stoner–Wohlfarth particles. [ABSTRACT FROM AUTHOR]