Raman and in-field 57Fe Mössbauer study of cation distribution in Ga substituted cobalt ferrite (CoFe2-xGaxO4)

Structural and magnetic properties of Ga substituted cobalt ferrite (CoFe2-xGaxO4) samples are reported in the present work. Phase purity of the prepared samples is studied with x-ray diffraction measurements. The room temperature M-H loops are measured using vibrating sample magnetometer. From the...

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Published in:Journal of alloys and compounds 2020-10, Vol.837, p.155478, Article 155478
Main Authors: Sumalatha, M., Shravan kumar Reddy, S., Reddy, M. Sreenath, Sripada, Suresh, Raja, M. Manivel, Reddy, Ch Gopal, Reddy, P. Yadagiri, Reddy, V. Raghavendra
Format: Article
Language:English
Subjects:
Cations
Cobalt ferrites
Iron 57
Magnetic properties
Magnetic saturation
Magnetism
Magnetometers
Mossbauer spectroscopy
Raman spectroscopy
Room temperature
Spectrum analysis
Substitutes
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Summary:Structural and magnetic properties of Ga substituted cobalt ferrite (CoFe2-xGaxO4) samples are reported in the present work. Phase purity of the prepared samples is studied with x-ray diffraction measurements. The room temperature M-H loops are measured using vibrating sample magnetometer. From the room temperature M-H data, it is observed that Ga substitution results in the soft-magnetic property in CoFe2O4. Saturation magnetization is found to change for higher substitution of Ga (x > 0.2). The cation distribution with Ga substitution is estimated from the analysis of Raman spectroscopy data and in-field 57Fe Mössbauer spectroscopy measurements. Using the obtained complimentary information, it is concluded that the Fe3+ is forced to occupy more octahedral co-ordination with Ga substitution in CoFe2O4. •Substitution effects of Ga in CoFe2O4 (CoFe2-xGaxO4) are studied.•Ga substitution in CoFe2O4 results in soft-magnetic property.•Ferrimagnetic ordering is confirmed by in-field Mössbauer measurements.•Inversion parameter is observed to decrease with Ga substitution.•Fe3+ is forced to occupy more octahedral co-ordination with Ga substitution.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2020.155478