Title :
Preparation and magnetic properties of (Co,Zn)-doped γ-Fe2O3 particles
Author :
Lin, C.H. ; Kuo, P.C. ; Chen, J.A. ; Yao, Y.D.
Author_Institution :
Dept. of Mater. Sci., Tsing Hua Univ., Hsinchu, Taiwan
fDate :
11/1/1994 12:00:00 AM
Abstract :
Oxidation temperatures and times of Fe3O4 to produce (Co,Zn)-doped γ-Fe2O3 particles were examined in this study to relate these two parameters to void, particle size, saturation magnetization, coercivity, and squareness. The effect of Zn/Co ratio on magnetization and coercivity of the particles was also studied. The partial substitution of Zn for Co in Co-γ-Fe2 O3 increased the σ value and environmental stability, but decreased the iHc and the squareness of γ-Fe2O3
Keywords :
cobalt; coercive force; ferrites; magnetic particles; magnetic recording; magnetisation; oxidation; particle size; zinc; Fe2O3:Co,Zn; coercivity; environmental stability; ferrites; high density recording media; oxidation temperatures; partial substitution; particle size; saturation magnetization; squareness; Anisotropic magnetoresistance; Cobalt; Coercive force; Ferrites; Magnetic properties; Oxidation; Stress; Temperature; X-ray scattering; Zinc;
Journal_Title :
Magnetics, IEEE Transactions on
