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Preparation and magnetic properties of (Co,Zn)-doped γ-Fe2O3 particles

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4 Author(s)
Lin, C.H. ; Dept. of Mater. Sci., Tsing Hua Univ., Hsinchu, Taiwan ; Kuo, P.C. ; Chen, J.A. ; Yao, Y.D.

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

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Magnetics, IEEE Transactions on  (Volume:30 ,  Issue: 6 )