Title :
New cobalt-deposited iron oxide particles prepared by photochemical reaction
Author :
Kishimoto, M. ; Nakazumi, T. ; Amemiya, M. ; Kawai, T. ; Kawai, S.
Author_Institution :
Hitachi Maxell, Ltd., Koizumi, Otokuni, Oyamazaki, Kyoto, Japan
fDate :
9/1/1987 12:00:00 AM
Abstract :
Particles having high values in both coercivity and saturation magnetization are prepared by depositing metallic cobalt on γ-Fe2O3particles using photochemical reaction. EPMA and XPS depth profiling show that cobalt layer is formed on the γ-Fe2O3particles. When the cobalt layer of the particles is dissolved in hydrochloric acid, the coercivity and saturation magnetization of the particles are decreased to the values of pure γ-Fe2O3particles. The higher coercivity and saturation magnetization of the particles are attributed to the cobalt layer on the γ-Fe2O3particles.
Keywords :
Magnetic recording; Cobalt; Coercive force; Electron emission; Electron microscopy; Iron; Magnetic properties; Photochemistry; Probes; Saturation magnetization; Sputtering;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.1987.1065381