Structural and magnetic properties of Sr0.15Ca0.3La0.55Fe11.65-xCo0.35ZnxO19 ferrites synthesized through the ceramic process

• Published in: Journal of materials science. Materials in electronics 2023-09, Vol.34 (27), p.1859, Article 1859
• Main Authors: Yuping, Li, Yujing, Zhang, Zhen, Zhang, Jinghang, He
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Crystal lattices; Magnetic properties; Materials Science; Optical and Electronic Materials; Particle size; Raw materials; Substitutes; Synthesis
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-023-11317-6

In this study, Zn 2+ -substituted Sr 0.15 Ca 0.3 La 0.55 Fe 11.65−x Co 0.35 Zn x O 19 (0 ≤  x  ≤ 0.15) ferrites were synthesized by the ceramic method. The effects of Zn 2+ substitution on the structural and magnetic performance of samples were studied. The X-ray diffraction results show that ferrite samples with the high purity M-type phase can be obtained when the substitution amount of Zn 2+ is x =  0–0.1. Further increasing the Zn content to x  = 0.15, the impurity soft magnetic phase of ZnFe 2 O 4 is detected, which harms the hard magnetic properties. The Mössbauer results show that Zn 2+ ions enter the crystal lattice of the M-type phase and solely occupy the 4f 1 site, thereby promoting the conversion of Fe 2+ to Fe 3+ at the 2a position. It is observed that the particle size of the sintered samples slightly increases as x increases from 0 to 0.1, but decreases when x = 0.15. Ultimately, we achieved an optimal magnetic performance with the highest maximum energy product of 5.75 MGOe, which is highly competitive within the ferrite family.