Title :
Epitaxial growth of NiZn ferrite on barium ferrite particles
Author :
Jung, Hong-Sik ; Hong, Yang-Ki
Author_Institution :
Dept. of Metall. Eng., Idaho Univ., Moscow, ID, USA
fDate :
7/1/1998 12:00:00 AM
Abstract :
Homogeneous (Ni0.5Zn0.5)xFe3-xO4 epitaxial layers were grown on Co-Ni-Ti-Sn substituted barium ferrite (BaFe) by aging neutral suspensions at 95°C under N2 atmosphere. In all compositions the coercivity (Hc) increased remarkably within 10 minutes, followed by a slow decay for x⩽0.6. No change in full width half maximum (ΔH) of dM/dH versus H curve with reaction time was observed for x⩾0.6. The specific saturation magnetization (σs) of composition with x⩽0.6 increased with the reaction time, while rapidly decreased in 10 minutes for x>0.6, followed by an increase. Doping Fe3 O4 with Ni and Zn has dramatically improved homogeneity of epitaxial layer and thermal stability of composite BaFe. Accordingly, optimized magnetic properties and thermal stability were obtained at x=0.6
Keywords :
barium compounds; coercive force; ferrites; liquid phase epitaxial growth; magnetic epitaxial layers; magnetic particles; nickel compounds; surface magnetism; thermal stability; zinc compounds; (Ni0.5Zn0.5)xFe3-xO 4 epitaxial layers; (NiZn)Fe3O4; 95 C; Co-Ni-Ti-Sn substituted barium ferrite; NiZn ferrite; TEM; aging neutral suspensions; barium ferrite particles; coercivity; doping effect; epitaxial growth; full width half maximum; homogeneity; homogeneous composite; homogeneous epitaxial layers; optimized magnetic properties; specific saturation magnetization; surface anisotropy; thermal stability; Aging; Atmosphere; Barium; Epitaxial growth; Epitaxial layers; Ferrites; Iron; Suspensions; Thermal stability; Zinc;
Journal_Title :
Magnetics, IEEE Transactions on
