Effect of Mg substitution on magnetic properties of Co1−xMgxFe2O4 nanoparticles investigated by EXAFS analysis. (August 2017)

• Record Type: Journal Article
• Authors: Wongpratat, Unchista; Maensiri, Santi; Swatsitang, Ekaphan
• Is Part Of: Ceramics international. Volume 43(2017)Supplement 1
• Page Start: S351
• Page End: S358
• Publication Date: 2017-08
• Subjects: Powders: chemical preparation (A) -- X-ray methods (B) -- Magnetic properties (C) -- Ferrites (D); Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2017.05.206
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Co1−x Mgx Fe2 O4 (x = 0.00, 0.25, 0.50, 0.75 and 1.00) nanoparticles were prepared by the hydrothermal method in Aloe vera extract solution. X-ray diffraction (XRD) results indicate a pure phase of all samples with the cubic spinel ferrite structure. TEM images reveal a decrease in average particle sizes from 37.03 ± 13.17 to 9.86 ± 2.63 nm with increasing Mg content. The X-ray absorption near edge structure (XANES) technique confirmed the existence of Co 2+ and Fe 2+, 3+ with partial substitutions of Mg cations in the structure. The magnetic properties of samples studied by vibrating sample magnetometer (VSM) indicated ferrimagnetism at room temperature. The saturation magnetizations (Ms ) significantly decreased with increasing Mg content, relating to cation distribution revealed by the EXAFS results.