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Preparation, characterization and magnetic properties of the doped barium hexaferrites BaFe12−2xCox/2Znx/2SnxO19, x=0.0–2.0 by Ying Liu; Michael G.B. Drew; Yue Liu; Jingping Wang; Milin Zhang is a Materials Science article available to read on EtoBox.

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A series of powders of M-typed barium hexaferrites doped with Co, Zn and Sn of general formula BaFe 12-2x Co x/2 Zn x/2 Sn x O 19 (x =0-2.0) were prepared by the co-precipitation/molten salt method. The structures, particle morphology and magnetic properties of the products were characterized by X-ray powder diffraction, vibrating sample magnetometer and ESEM/EDX. The results show that the crystallinity of the samples decreases with increase in the doping amount x. When x is less than 0.6, it is possible to obtain perfectly crystallized hexagonal BaFe 12-2x Co x/2 Zn x/2 Sn x O 19 , where the diameters of the particles are around 500 nm. The saturation magnetization of pure barium ferrite BaFe 12 O 19 produced with this method is 71.9 A m 2 kg À 1 at room temperature and the intrinsic coercivity (H c ) is 367.8 kA m À 1 . The doped barium hexaferrite powder obtained when x is between 0.3 and 0.4 exhibits high saturation magnetization and a temperature dependence of coercivity close to zero.

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Author

Ying Liu; Michael G.B. Drew; Yue Liu; Jingping Wang; Milin Zhang

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0304-8853)

Published

2010

Language

EN

Field

Materials Science (Physical Sciences)