| Numéro |
J. Phys. Colloques
Volume 40, Numéro C2, Mars 1979
International Conference on The Applications of The Mössbauer Effect
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|
|---|---|---|
| Page(s) | C2-583 - C2-585 | |
| DOI | https://doi.org/10.1051/jphyscol:19792203 | |
International Conference on The Applications of The Mössbauer Effect
J. Phys. Colloques 40 (1979) C2-583-C2-585
DOI: 10.1051/jphyscol:19792203
Research Institute for Scientific Measurements, Tohoku University, Sendai, Japan
J. Phys. Colloques 40 (1979) C2-583-C2-585
DOI: 10.1051/jphyscol:19792203
MORPHOLOGY OF NONSTOICHIOMETRIC Fe3O4 PARTICLES AS MAGNETIC RECORDING MEDIA
K. Haneda and H . KojimaResearch Institute for Scientific Measurements, Tohoku University, Sendai, Japan
Résumé
La morphologie des particules Fe3O4 non-stoechiométriques a été étudiée par effet Mössbauer et par des expériences cinétiques pour élucider l'origine de l'augmentation du champ coercif en comparaison avec Fe3O4 pur ou γ-Fe2O3. Il est proposé que la particule Fe304 non-stoechiométrique est en fait composée des cristallites finement divisés de γ-Fe2O3 et Fe3O4 pur.
Abstract
The morphology of nonstoichiometric Fe3O4 particles has been examined through Mössbauer and kinetic experiments, in connection with the origin of its enhanced magnetic coercivity as compared with pure Fe3O4 or γ-Fe2O3. It is suggested that a so-called non-stoichiometric Fe3O4 particle is actually composed of finely divided crystallites of γ-Fe2O3 and pure Fe3O4.