Effect of doping MnO2 on magnetic properties for M-type barium ferrite

The crystalline structure and magnetic properties of M-type barium ferrite doped with small amounts of MnO2 (,0.2,0.,0.75, 1.0, 1.5, and 2.0wt%, respectively) have been investigated by means of XRD, SEM and VSM. The results show that the crystalline structures of barium ferrite are still M-type hexa...

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Veröffentlicht in:	Journal of magnetism and magnetic materials 2007-04, Vol.311 (2), p.507-511
Hauptverfasser:	Zhang, Xin, Duan, Yuping, Guan, Hongtao, Liu, Shunhua, Wen, Bin
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Domain effects, magnetization curves, and hysteresis Exact sciences and technology Magnetic properties and materials Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects Physics
Online-Zugang:	Volltext
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Zusammenfassung:	The crystalline structure and magnetic properties of M-type barium ferrite doped with small amounts of MnO2 (,0.2,0.,0.75, 1.0, 1.5, and 2.0wt%, respectively) have been investigated by means of XRD, SEM and VSM. The results show that the crystalline structures of barium ferrite are still M-type hexagonal structure and Mn ions are distributed homogeneously in both the grains and the grain boundaries. The saturation magnetization and magnetocrystalline anisotropy constants both reach the highest values when x=0.75wt%. The displacement of Fe ions from 4f1 to 2b site is mainly responsible for the appearance of the maximum values.
ISSN:	0304-8853
DOI:	10.1016/j.jmmm.2006.08.007