NDLI: Effects of cation distribution on superexchange interaction in cobalt ferrites

Content Provider	IEEE Xplore Digital Library
Author	Na, J.G. Lee, T.D. Park, S.J. Tang, Y.J. Luo, H.L.
Copyright Year	1965
Abstract	The effects of the cation distribution change on the superexchange parameters and magnetic properties of cobalt ferrite powders were investigated. The cation distribution change of cobalt ferrite powders with quenching treatment was confirmed from the Mossbauer experiments. The exchange interaction parameters, i.e. J/sub AA/, J/sub BB/ and J(AB), and Neel temperature of slow-cooled and quenched CoFe/sub 2/O/sub 4/ powders were calculated from the variation of the magnetization with temperature on the basis of the two-sublattice model. With a quenching treatment of CoFe/sub 2/O/sub 4/, the thermal magnetization was changed, and this was attributed to the cation distribution change of cobalt ferrites. The absolute values of J/sub AB/ increased with the quenching treatment of CoFe/sub 2/O/sub 4/, while those of J/sub AA/ and T/sub N/ decreased. The values of J/sub BB/ of cobalt ferrite remained the same with the quenching treatment. This result suggested that the decrease of T/sub N/ of CoFe/sub 2/O/sub 4/ with quenching may be attributed to the decrease of J/sub AA/.
Sponsorship	IEEE Magnetics Society
Starting Page	3970
Ending Page	3972
Page Count	3
File Size	368550
File Format	PDF
ISSN	00189464
Volume Number	31
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cobalt Ferrites Powders Temperature Magnetic moments Ferrimagnetic materials Saturation magnetization Magnetic materials Magnetic field measurement Magnetic properties
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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