Enhanced magnetic properties of SrFe12O19 through exchange-coupled nanocomposite. (1st April 2022)

• Record Type: Journal Article
• Authors: Lamouri, R; Fkhar, L; Mounkachi, O; Mahmoud, A; Boschini, F; Hamedoun, M; Salmani, E; Kim, K H; Ali, M Ait; Benyoussef, A; Ez-zahraouy, H
• Is Part Of: Physica scripta. Volume 97:Number 4(2022)
• Publication Date: 2022-04-01
• Subjects: (1-x)SrFe12O19/xCoFe2O4 nanocomposites -- exchange-coupling -- permanent magnets; Physics -- Periodicals; 530.05
• DOI: 10.1088/1402-4896/ac57e2
• Languages: English
• ISSNs: 0031-8949

Abstract

Abstract: This work presents the synthesis and characterization of hard/soft (1-x)SrFe12 O19 /xCoFe2 O4 exchange-coupled nanocomposites with x = 0.0, 0.05, 0.1, and 0.2 using the conventional coprecipitation and ball milling preparation methods followed by heat treatment. CoFe2 O4 material was used as a soft magnetic material when the effects of its concentration on the structural and magnetic properties of the obtained nanocomposites were investigated using different characterization techniques. Structural and microstructural analyses showed the presence of both spinel ferrite and the M-type hexaferrite phase. Single-phase magnetic loops were observed for the prepared nanocomposites, indicating an exchange coupling interaction between CoFe2 O4 and SrFe12 O19 phases. To support this finding, a Henkel plot was performed, which revealed the presence of strong exchange coupling interaction in CS5 compared to CS10, unlike CS20, where the dipolar interaction is dominant. The obtained results demonstrate the possibility of enhancing the (BH)max of the M-type strontium hexaferrite through an exchange-coupled nanocomposite, using a simple and reproducible synthesis process with a small content of the soft magnetic phase.