Structural phase change in Co2.25Fe0.75O4 spinel oxide by vacuum annealing and role of coexisting CoO phase on magnetic properties
作者： R.N. Bhowmik , Manas Ranjan Panda , S.M. Yusuf , M.D. Mukadam , A.K. Sinha
DOI: 10.1016/J.JALLCOM.2015.05.276
关键词:
摘要: Abstract The spinel oxide Co 2.25 Fe 0.75 O 4 has been prepared by co-precipitation route. as material annealed at 800 °C under vacuum. Properties of the samples vacuum have compared with sample in air. Synchrotron X-ray diffraction, Raman spectroscopy and absorption near edge structure used for structural phase characterization. cubic air splitted into rich phases. transformed Cobalt monoxide (CoO) after annealing. This resulted an increase Fe:Co ratio phase. spectra indicated a transformation distribution ions from normal like to mixed existence tetravalent 4+ ion confirmed all it is new information doped ferrite system. All exhibited ferrimagnetic behavior exchange bias effect. focus point that annealing effective route processing control also, enhancement magnetic properties ferrite.
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