Investigation on Ti4+ substitution LiZn ferrite with FMR linewidth at Ku band

作者：Yin, Qisheng; Liu, Yingli^*; Liu, Qian; Wang, Yu; Chen, Jianfeng; Wang, Haoxian; Wu, Chongsheng; Zhang, Huaiwu

来源：Materials Research Express, 2019, 6(3): 036108.

DOI：10.1088/2053-1591/aaf7db

• LiZn ferrite
• FMR linewidth
• Ku band

LiZn ferrites with different sintering temperature and substitution of Ti4+ were prepared by a ceramic process. Pure spinel phase was observed by XRD analysis. Morphological features exhibited a growth in grain size and saturation magnetization dramatically decreased with increase of sintering temperature and Ti4+ substitution contents, respectively. Anisotropy constant (K-1) was calculated by the law of approach to saturation and ferromagnetic resonance (FMR) linewidth (Delta H) at Ku band was investigated. The FMR linewidth had been separated to anisotropy-induced and porosity-induced linewidth by an approximate calculation based on spin-wave approach. It turns out that anisotropy contribution keeps almost a constant about 40 Oe with various Ti4+ substitution. However, porosity induced linewidth (Delta H-p ) reduce with various sintering temperature. The results also show that Delta H-p occupies the majority of Delta H at Ku band and optimizing densification is an effective way to decrease Delta H.

• 单位
  电子科技大学