铁氧体(磁铁)
微波食品加热
毫米
材料科学
各向异性
吸收(声学)
极高频率
离子
饱和(图论)
分析化学(期刊)
铁磁共振
磁化
核磁共振
磁场
化学
光学
复合材料
量子力学
组合数学
物理
数学
有机化学
色谱法
作者
Kazushige Hyodo,Jun Kano,Makoto Nakanishi,Tatsuo Fujii
摘要
Millimeter wave absorption exceeding 70 GHz has been performed in a Co-substituted Ca–La magnetoplumbite (M-type) ferrite. A polymerized complex method was used to increase the substitution of La and Co ions in the M-type ferrite. The increase in the magnetic anisotropy field combined with the remaining significant saturation magnetization results in good magnetic resonance absorption in the millimeter range of 70–100 GHz. Above 70 GHz, good millimeter wave absorption of more than −20 dB was achieved in 0.25 mm thickness plates of Ca0.46La0.54Fe11Co0.28O19-η and Ca0.42La0.58Fe11Co0.58O19-η. Highly Co-substituted Ca–La M-type ferrites may, thus, be promising candidates for magnetic absorption materials operating in frequencies of up to 100 GHz.
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