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Improved cut-off frequency in Gd/La doped NiZnCo ferrites

机译：GD / LA掺杂Niznco铁氧体中的改进截止频率

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摘要

The rare earth doped NiZnCo ferrite ceramics were prepared by the sol-gel auto-combustion method. Pure spinel structure was obtained when rare earth content x ≤ 0.02. The first increase of lattice parameters of NiZnCo ferrite after adding rare earth metal implies that rare earth ions enter into the crystalline lattice. At the same time, the bulk density decreases and the porosity increases. The saturation magnetization (M_s) decreases slightly from 85 to 81 emu/g. Curie temperature (T_c) decreases slightly from 241 to 210°C because of the weakening of the superexchange interaction between A-site and B-site. The initial permeability (μ_i) of samples changes little, but the cut-off frequency (f_r) increases a lot. Small amounts of rare earth additions have positive impact on the magnetic behavior of NiZnCo ferrites, because the resonance cut-off frequency f_r exceeds 300 MHz. Hence the rare earth doped ferrite materials find potential applications in high frequency side of electromagnetic spectrum.
机译：通过溶胶 - 凝胶自动燃烧方法制备稀土掺杂的Niznco铁氧体陶瓷。当稀土含量x≤0.02时获得纯尖晶石结构。加入稀土金属后Niznco铁素体的晶格参数的第一次增加意味着稀土离子进入结晶晶格。同时，堆积密度降低，孔隙率增加。饱和磁化强度（M_S）略微降低85至81 emu / g。居里温度（T_C）略微从241到210℃降低，因为A现场和B场之间的超速相互作用弱化。样本的初始渗透率（μ_i）几乎没有变化，但截止频率（f_r）增加了很多。少量稀土添加对Niznco铁氧体的磁性行为产生正影响，因为谐振截止频率f_r超过300 MHz。因此，稀土掺杂铁氧体材料在电磁谱的高频侧发现潜在的应用。

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  • 来源
    《Materials Science and Engineering》 |2021年第10期|115334.1-115334.5|共5页
  • 作者

    Zhou Xueyun; Yao Dongsheng; Zhou Liling; Zhang lingling;

  • 作者单位

    School of Science Civil Aviation University of China Tianjin 300300 China School of Science and Key Laboratory for Solid State Microstructure of Jiangxi Province Jiujiang University Jiujiang Jiangxi 332005 China;

    Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology Facility of Science Tianjin University Tianjin 300072 China;

    School of Science and Key Laboratory for Solid State Microstructure of Jiangxi Province Jiujiang University Jiujiang Jiangxi 332005 China;

    School of Science and Key Laboratory for Solid State Microstructure of Jiangxi Province Jiujiang University Jiujiang Jiangxi 332005 China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Rare earth; Ferrite; Initial permeability; Cut-off frequency;

    机译：稀土;铁氧体;初始渗透率;截止频率;

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