Influence of Iron Content on Microstructure and Magnetic Properties of Sr0.3La0.4Ca0.3n(Fe2O3)Co0.4

• Published in: Journal of superconductivity and novel magnetism 2018, Vol.31 (1), p.183-187
• Main Authors: Wang, Wei, Liu, Xiansong, Jiang, Shuai, Wu, Yingchun, Zhang, Cong, Liu, Chaocheng, Ur Rehman, Khalid Mehmood
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Condensed Matter Physics; Magnetic Materials; Magnetism; Original Paper; Physics; Physics and Astronomy; Strongly Correlated Systems; Superconductivity
• ISSN: 1557-1939; 1557-1947
• DOI: 10.1007/s10948-017-4190-6

In this work, the hexagonal ferrite Sr 0.3 La 0.4 Ca 0.3 n (Fe 2 O 3 )Co 0.4 , where n ranging from 5.5 to 6.0 with a step of 0.1, and magnetic powders and magnets were synthesized by solid-states reaction. The microstructure of the magnetic powders was investigated by X-ray diffraction (XRD). And then we can found that a single magnetoplumbite phase is obtained for magnetic powders as a result when 5.6 ≤ n ≤ 5.8. When the iron content in the magnetic powders increased continuously, the diffraction peaks of α -Fe 2 O 3 were observed. Scanning electron microcopy (SEM) was used to explore the micrographs of the magnets and the hexagonal-shaped crystals were found obviously. The magnetic properties of the M-type hexagonal ferrites Sr 0.3 La 0.4 Ca 0.3 n (Fe 2 O 3 )Co 0.4 were studied by using vibrating sample magnetometry. The saturation magnetization ( M s ) first increased and then began to decrease with the n increasing. While the coercivity first decreased with the n from 5.5 to 5.9 and then increased when n ≥5.9. The coercivity ( H c ) of the hexagonal ferrite Sr 0.3 La 0.4 Ca 0.3 n (Fe 2 O 3 )Co 0.4 reaches the maximum value ( H c = 1130 Oe) when the iron content ( n = 5.5).