Abstract
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 (K1) was calculated by the law of approach to saturation and ferromagnetic resonance (FMR) linewidth (ΔH) 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 (ΔHp) reduce with various sintering temperature. The results also show that ΔHp occupies the majority of ΔH at Ku band and optimizing densification is an effective way to decrease ΔH.
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