Dipolar ferromagnetism in ensembles of ellipsoidal nanoparticles

Authors
Denisov, SI Nefedchenko, VF Trohidou, KN
Citation
Si. Denisov et al., Dipolar ferromagnetism in ensembles of ellipsoidal nanoparticles, J PHYS-COND, 12(31), 2000, pp. 7111-7115
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF PHYSICS-CONDENSED MATTER
ISSN journal
09538984 → ACNP
Volume
12
Issue
31
Year of publication
2000
Pages
7111 - 7115
Database
ISI
SICI code
0953-8984(20000807)12:31<7111:DFIEOE>2.0.ZU;2-Q
Abstract
The phase diagram and mean local field theory for ensembles of dipolar inte racting ellipsoidal nanoparticles randomly distributed over the sites of a tetragonal lattice are constructed. Dipolar ferromagnetism in the ensembles arises from a competition between the ferro- and antiferromagnetic interac tions of the nanoparticle magnetic moments. A critical temperature is defin ed for these systems with magnitude depending on the shape of the nanoparti cles.