Magnetic Properties of Cobalt and Manganese Oxide Spinel Ceramics

Sophie Guillemet-Fritsch, Christophe Tenailleau, Helene Bordeneuve, Abel Rousset
2010 Advances in Science and Technology  
Magnetic susceptibility measurements, magnetization and neutron diffraction results at low temperature for cobalt and manganese oxide spinel ceramics are presented. The Curie temperature varies similarly with the sample composition in ceramics and powders. The experimental molar Curie constant variation is explained by the presence of Co2+, CoIII, Mn3+ and Mn4+, and possibly Co3+ in the octahedral sites for the cobalt rich phases. The magnetic moments of the cations in tetrahedral and
more » ... sites are not collinear and the global magnetization is oriented in a third direction.
doi:10.4028/www.scientific.net/ast.67.143 fatcat:xyr3fnrmsbh5pgjd7h6pa2kcem