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

Abstract

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.