Eu–Co substituted Sr-hexaferrites for recording media and microwave devices

• Published in: Journal of materials science. Materials in electronics 2022-05, Vol.33 (15), p.12147-12156
• Main Authors: Alharbi, F. F., Aman, Salma, Ahmad, Naseeb, Ejaz, Syeda Rabia, Khosa, Rabia Yasmin, Abbas, Sajid, Abid, Abdul Ghafoor, Al-Buriahi, M. S., Alrowaili, Z. A., Waheed, Muhammad Suleman
• Format: Article
• Language: English
• Subjects: Caustic soda; Characterization and Evaluation of Materials; Chemistry and Materials Science; Cobalt; Coercivity; Crystallites; Electrical resistivity; Hysteresis loops; Investigations; Magnetic properties; Magnetic saturation; Magnetic storage; Materials Science; Microemulsions; Morphology; Nitrates; Optical and Electronic Materials; Physics; Recording; Recording instruments; Remanence; Scanning electron microscopy; Surfactants
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-022-08175-z

Among ferrites materials, M-type hexaferrites are very important due to their excellent technological applications. In the present investigation, Eu 3+ and Co 2+ -doped Sr-hexaferrite at the sites of strontium and iron (Sr 1−x Eu x Fe 12− y Co y O 19 ) were fabricated using normal micro-emulsion process. Magnetoplumbite single-phase material was approved with the help of X-ray diffraction analysis with crystallite sizes ranging from 35 to 57 nm. Magnetic characteristics like remanence ( M r ), coercivity ( H c ), and saturation magnetization ( M s ) were estimated using hysteresis loop data. The concentration of Eu–Co increases the M s and M r values while reducing the value of H c . To determine the DC electrical resistivity the method of two points probe was used which increases with the Eu–Co content. The reduction in values of coercivity, dielectric constant, and loss while enhancement in M s , M r , and resistivity against Eu–Co content, indicating that these materials are acceptable for commercial application in microwave appliances and recording media.