Numéro
J. Phys. IV France
Volume 07, Numéro C1, Mars 1997
7th INTERNATIONAL CONFERENCE ON FERRITES
Page(s) C1-327 - C1-328
DOI https://doi.org/10.1051/jp4:19971130
7th INTERNATIONAL CONFERENCE ON FERRITES

J. Phys. IV France 07 (1997) C1-327-C1-328

DOI: 10.1051/jp4:19971130

Cobalt Ferrite CoxFe3-xO4 (0.4 < x < 0.7) with High Coercive Fields (2000 Oe < Hc < 6000 Oe)

G. Pourroy1, S. Läkamp1, M. Multigner2, A. Hernando2, J.-L. Dormann3 and R. Valenzuela-Monjaras4

1  Institut de Physique et Chimie des Matériaux de Strasbourg, Groupe des Matériaux Inorganiques, 23 rue du Loess, 67037 Strasbourg cedex, France
2  Instituto de Magnetismo Aplicado, Laboratorio "Salvador Velayes", Apdo. Correos 155, 28230 Las Rozas Madrid, Spain
3  Laboratoire de Magnétisme et d'Optique de l'Université de Versailles, URA D1531 du CNRS, Bâtiment Fermat, 45 avenue des Etats-Unis, 78035 Versailles cedex, France
4  Instituto de Investigaciones en Materiales, Universidad Nacional Autonoma de Mexico, Apartado Postal 70-360, 04510 Mexico D.F, Mexico


Abstract
Cobalt - doped magnetites with coercive fields up to 5400 Oe have been obtained by taking off the metallic part of composites made of iron cobalt alloy and spinel oxide. That results in a decrease of saturation magnetization of composites and to an increase of coercive fields. Most of particles are monodomains. The behavior is interpreted by using the Stoner-Wohlfarth model.



© EDP Sciences 1997