MOSSBAUER-SPECTROSCOPY OF FE3O4 ULTRAFINE PARTICLES

Authors
LEHLOOH AF MAHMOOD SH
Citation
Af. Lehlooh et Sh. Mahmood, MOSSBAUER-SPECTROSCOPY OF FE3O4 ULTRAFINE PARTICLES, Journal of magnetism and magnetic materials, 151(1-2), 1995, pp. 163-166
Citations number
20
Categorie Soggetti
Material Science","Physics, Condensed Matter
Journal title
Journal of magnetism and magnetic materials → ACNP
ISSN journal
03048853
Volume
151
Issue
1-2
Year of publication
1995
Pages
163 - 166
Database
ISI
SICI code
0304-8853(1995)151:1-2<163:MOFUP>2.0.ZU;2-T
Abstract
Mossbauer spectroscopy is used to study a system of Fe3O4 ultra-fine p articles at temperatures down to 5 K. The effective magnetic anisotrop y constant, K, for the system is calculated using the method based on the superparamagnetic relaxation phenomenon, and that based on collect ive magnetic excitation model, and the results are 2.6 X 10(5) and 2.0 x 10(5) J/m(3), respectively. These values are larger than those obta ined by others for systems with larger mean diameters, implying a sign ificant size dependence of K.