Study of Quasi-Monophase Y-Type Hexaferrite Ba 2 Mg 2 Fe 12 O 22 Powder
Micro and Nanosystems(2014)
摘要
We present the structural and magnetic properties of a multiferroic Ba2Mg2Fe12O22 hexaferrite composite containing a small amount of MgFe2O4. The composite material was obtained by auto-combustion synthesis and, alternatively, by co-precipitation. The Ba2Mg2Fe12O22 particles obtained by co-precipitation have an almost perfect hexagonal shape in contrast with those prepared by auto-combustion. Two magnetic phase transitions, responsible for the composite’s multiferroic properties, were observed, namely, at 183 K and 40 K for the material produced by auto-combustion, and at 196 K and 30 K for the sample prepared by co-precipitation. No magnetic phase transitions in these temperature ranges were observed for a MgFe2O4 sample, which shows that the magnesium ferrite does not affect the multiferroic properties of this type of multiferroic metarials. Keywords: Auto-combustion synthesis, Ba2Mg2Fe12O22, co-precipitation, MgFe2O4, multiferroic composite, multiferroics properties, Y-type hexaferrite.
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关键词
hexaferrite,ba<,sub>,2<,/sub>,mg<,sub>,2<,/sub>,fe<,sub>,12<,/sub>,o<,sub>,22<,/sub>,quasi-monophase,y-type
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