Enhanced magnetic properties of Sr0.7Ce0.3Fe11.7Zn0.3O19 by tuning pre-sintering temperature

• Published in: Journal of alloys and compounds Vol. 941; p. 168833
• Main Authors: Lu, Shifan, Liu, Yingli, Yin, Qisheng, Chen, Jianfeng, Wu, Jian, Li, Jie
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 25.04.2023
• Subjects: C-axis oriented; Hexaferrite; High remanence ratio; Pre-sintering temperature; Pre-sintering temperature; High remanence ratio; C-axis oriented; Hexaferrite
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2023.168833

In this work, pre-sintering temperature was tuned to investigate its effect on the structural and magnetic properties of oriented M-type hexagonal strontium ferrite Sr0.7Ce0.3Fe11.7Zn0.3O19. X-ray diffraction pattern shows that Fe2O3 and CeO2 impurity phases exist in all samples. As pre-sintering temperature increased, both saturation magnetization (Ms) and remanence ratio (Mr/Ms) first increased and then decreased. In contrast, coercivity (Hc) and magnetocrystalline anisotropy field (Ha) first decreased and then increased as pre-sintering temperature went up. The average grain size (D) increases monotonously with pre-sintering temperature. At pre-sintering temperature of 1200 ℃, Sr0.7Ce0.3Fe11.7Zn0.3O19 achieved optimal magnetic properties of Ms = 58.24 emu/g, Mr/Ms = 0.95, Hc= 1816 Oe, Ha= 10433 Oe and K1 = 1.51 × 105 J/m3. This work shows that the magnetic properties of M-type hexagonal strontium ferrite could be significantly improved by optimizing the pre-sintering temperature, which helps the design of high-performance and self-biased circulator. •Sr0.7Ce0.3Fe11.7Zn0.3O19 shows a very high remanence Mr/Ms with value of 0.95.•The optimum pre-sintering temperature of Sr0.7Ce0.3Fe11.7Zn0.3O19 is determined to be 1200 ℃.•Oriented Sr0.7Ce0.3Fe11.7Zn0.3O19 exhibits a preferred orientation along c-axis.