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A Study on Structure and Magnetic Properties of Mg-Cu-Zn Ferrite Synthesized by Co-Precipitation Method

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5 Author(s)
Hai-Xia Zhou ; Dept. of Appl. Phys., Tianjin Univ., Tianjin, China ; Zhi Wang ; Feng-Qun Huang ; Li-Jun Ni
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A series of Cu substituted Mg-Zn ferrite powders Mg0.55-xCux Zn0.45 Fe2O4 with x = 0.0, 0.1, 0.2, 0.3, 0.4 were synthesized by chemical co-precipitation method. The structure and magnetic behavior of the powders are investigated by x-ray diffraction (XRD) and vibrating sample magnetometer (VSM). The results show that all the samples annealed at 600°C are pure spinel phase and the copper content has an obvious influence on coercivity (Hc), saturation magnetization (Ms) and the lattice constant (a). The densification characteristics and magnetic properties of the low-temperature sintered Mg0.55-xCuxZn0.45Fe2O4 (0.0 ≤ x ≤ 0.4) ferrites were also investigated. The density of sintered samples is observed to increase monotonously with Cu content. At the same time, the initial permeability (μi) is observed to increase with increase in copper content up to x = 0.2 followed by a decrease, while the Curie temperature (Tc) increase continuously from 125°C to 190°C when x increases from 0.0 to 0.4.

Published in:

Magnetics, IEEE Transactions on  (Volume:48 ,  Issue: 11 )

Date of Publication:

Nov. 2012

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