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

• DOI: 10.1016/j.jallcom.2020.155478
• Publication Date: 2020-05-11T16:40:07Z
• Authors: M. Sumalatha; S. Shravan kumar ...; M. Sreenath Reddy; Suresh Sripada; M. Manivel Raja; Ch Gopal Reddy; P. Yadagiri Reddy; V. Raghavendra Reddy
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract 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 Mossbauer 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.