Localization and coercivity of random granular nanomagnets - art. no. 012401

Citation
Y. Yu et al., Localization and coercivity of random granular nanomagnets - art. no. 012401, PHYS REV B, 6401(1), 2001, pp. 2401
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6401
Issue
1
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010701)6401:1<2401:LACORG>2.0.ZU;2-N
Abstract
We study the spin configurations of the random granular nanomagnets in the strong to intermediate pinning limit by Monte Carlo simulations. The differ ence in spin configurations at zero and finite field is localized. A deloca lization transition takes place at a critical field. We develop an analytic method to understand the localization pattern of the difference in spin co nfigurations. We also analytically calculate the finite temperature coerciv e field and find good agreement with our Monte Carlo results.