Magnetic properties of Ce doped M-type strontium hexaferrites synthesized by ceramic route

• Published in: Journal of magnetism and magnetic materials 2019-03, Vol.474, p.83-89
• Main Authors: Rehman, Khalid Mehmood Ur, Riaz, Muhammad, Liu, Xiansong, Khan, Muhammad Wasim, Yang, Yujie, Batoo, Khalid Mujasam, Adil, Syed Farooq, Khan, Mujeeb
• Format: Article
• Language: English
• Subjects: Ce doping content; Ceramic process; Cerium; Coercivity; M-type hexaferrites (MHF); Magnetic induction; Magnetic properties; Magnetism; Magnets; Photomicrographs; Remanence; Sintering (powder metallurgy); Sr1−xCexFe12O19 (SCFO); X-ray diffraction; X-ray diffraction (XRD)
• ISSN: 0304-8853; 1873-4766
• DOI: 10.1016/j.jmmm.2018.10.087

•In the present study Ce3+ ions doped M-type hexaferrite Sr1−xCexFe12O19 (0.00 ≤ x ≤ 0.30) magnetic powder and magnets existed to ready according to the conventional ceramic process.•Lattice constants (c) for all the samples are different but lattice constant (a) remains almost same.•The saturation magnetization (Ms) was very low, while coercivity (Hc) was high. This paper highlights the experimental study of Ce3+ ions doped M-type hexaferrite Sr1−xCexFe12O19 (0.00 ≤ x ≤ 0.30) prepared by adopting the conventional ceramic process. The M-type hexagonal structure is confirmed in the X-ray diffraction measurements. There were two phases recognized for the magnetic powders with varying Ce content, one in-between x = 0.00 to 0.20 as a single magneto plumbite segment and the other at x ≥ 0.20 as a second phase or the so called α-Fe2O3 phase. The micrographs of the sintered magnets depicted hexagonal crystal shapes. For magnetic properties a systematic study was done on the room temperature B–H hysteresis measurements. The estimated remanence value first increases with x in the range of x = 0.00 to 0.15 and then showed a decrease at x ≥ 0.15. Besides, the intrinsic coercivity (Hcj) and magnetic induction coercivity (Hcb) show decreasing-increasing character while maximum energy product (BHmax) and ratio Hk/Hcj demonstrate increasing-decreasing character in the Ce doping range x of x ≤ 0.15 and x > 0.15 respectively.