Magnetism of diluted Co3O4 nanocrystals

Citation
Y. Hayakawa et al., Magnetism of diluted Co3O4 nanocrystals, PHYSICA E, 9(2), 2001, pp. 250-252
Citations number
4
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA E
ISSN journal
1386-9477 → ACNP
Volume
9
Issue
2
Year of publication
2001
Pages
250 - 252
Database
ISI
SICI code
1386-9477(200102)9:2<250:MODCN>2.0.ZU;2-W
Abstract
An assembly of Co3O4 nanocrystals dispersed in an amorphous silicate was pr epared by calcination of molecular sieve soaked in precursor solution with the concentration of 0.1 mol/l. We observed the disappearance of antiferrom agnetic phase transition at 33 K of bulk Co3O4, and frequency dependence of the cusp temperature below 30 K in the AC susceptibility measurement. Dive rgent peaks at around 18 and 22 K were observed in the nonlinear susceptibi lity measurement, implying that the sample is in the spin-glass phase. The magnetic interparticle interactions were collective for the Co3O4 nanocryst als dispersed in nonmagnetic silicate. (C) 2001 Elsevier Science B.V. All r ights reserved.