Structural phase stability and magnetism in Co2FeO4 spinel oxide

We report a correlation between structural phase stability and magnetic properties of Co2FeO4 spinel oxide. We employed mechanical alloying and subsequent annealing to obtain the desired samples. The particle size of the samples changes from 25 nm to 45 nm. The structural phase separation of samples...

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Bibliographic Details
Published in:Solid state sciences 2009-03, Vol.11 (3), p.719-725
Main Authors: PANNEER MUTHUSELVAM, I, BHOWMIK, R. N
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Ferrimagnetics
Inorganic compounds
Magnetic properties and materials
Physics
Structure of solids and liquids
crystallography
Structure of specific crystalline solids
Studies of specific magnetic materials
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Summary:We report a correlation between structural phase stability and magnetic properties of Co2FeO4 spinel oxide. We employed mechanical alloying and subsequent annealing to obtain the desired samples. The particle size of the samples changes from 25 nm to 45 nm. The structural phase separation of samples, except sample annealed at 900 deg C, into Co-rich and Fe-rich spinel phase has been examined from XRD spectrum, SEM picture, along with EDX spectrum, and magnetic measurements. The present study indicated the ferrimagnetic character of Co2FeO4, irrespective of structural phase stability. The observation of mixed ferrimagnetic phases, associated with two Curie temperatures at TC1 and TC2 ( > TC1), respectively, provides the additional support of the splitting of single cubic spinel phase in Co2FeO4 spinel oxide.
ISSN:1293-2558
1873-3085
DOI:10.1016/j.solidstatesciences.2008.10.012