RELAXATION PROCESS IN COBALT-FERRITE EPITAXIAL IRON OXIDES
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Abstract
The migration process of Co ions in the cobalt-ferrite epitaxial layer on γ-Fe2O3 powder has been studied by magnetic thermal annealing method. The activation energy E and coefficient A of Co ions have been measured. An abnormal increase of coercivity of sample annealed in a transverse magnetic field was found. On the basis of Mössbauer and XPS results the reason of this phenomenon is discussed.
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