配向性Ｍ‐型バリウムフェライトＢａ１‐ｘＬａｘＺｎｘＦｅ１２‐ｘ‐ｙ（Ｍｅ０．５Ｍｎ０．５）ｙＯ１９における金属元素Ｌａ，Ｍｎ，Ｓｎ，Ｚｎ置換による高マイクロ波吸収特性への効果
書誌事項
- タイトル別名
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- Enhancement of Microwave Absorption Characteristics in Aligned M-type Barium Ferrite Ba1-xLaxZnxFe12-x-y(Me0.5Mn0.5)yO19 (x=0.0-0.5, Me: Sn,Zr, y=1.0-3.0) by Metal Substitution.
- ハイコウセイ M カタ バリウム フェライト Ba1 xLaxZnxFe12 x y Me0 5Mn0 5 yO19 ニ オケル キンゾク ゲンソ La Mn Sn Zn チカン ニ ヨル コウマイクロハ キュウシュウ トクセイ エ ノ コウカ
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抄録
Microwave radiation in the GHz band is increasingly being used in many various communication devices. However, this has brought about the problems of electromagnetic interference (EMI). Now M-type Ba ferrite is expected to be used as a powerful countermeasure to EMI. Our recent works have shown that M-type Ba ferrite is promising material for microwave absorber in the GHz range. The electromagnetic resonance absorption properties depend on the complex permeability μ=μ'-jμ", particularly the imaginary part μ"=Ms/2HAα(Ms: saturation magnetization, HA: anisotropy field, a: extinction coefficient). We investigated the effects of substitution composition (x) of Me for Ba (Me: La) and substitution composition (y) of Me ion (Me: Zn, Zr, Sn) for Fe3+ on the electromagnetic absorption properties of the Ba1-xLaxZnxFe12-x-y(Me0.5Mn0.5)yO19 compound. The c-axis aligned samples were formed into toroidal shapes. The magnetic properties (Ms, HA) and the resonance absorption properties (μr', μr" etc) were measured using a VSM and a network analyzer. The aligned Zr-substituted samples (x=0.0, y=1.4) showed values of HA =0.21 MAm-1, and μ'= 7.5 and μ" =7.1 that were higher than those of (TiMn) substituted samples. The matching thickness dm decreased to 0.8 mm at the matching frequency of 7.6 GHz. In the sample of x=0.0 and y=1.5, μ'=7.7 and μ" = 6.7 were obtained, and the matching thickness dm was 0.98 mm at 5.95 GHz. Also, Sn-substituted samples showed high m' and m" values of 6.3 and 6.3, respectively, and dm of 1.02mm. It is therefore concluded that Sn or Zr substitution is effective in enhancing the electromagnetic wave absorption characteristics of M-type Ba ferrite absorber.
収録刊行物
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- 粉体および粉末冶金
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粉体および粉末冶金 50 (1), 58-62, 2003
一般社団法人 粉体粉末冶金協会
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詳細情報 詳細情報について
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- CRID
- 1390282681283816832
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- NII論文ID
- 10010249022
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- NII書誌ID
- AN00222724
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- ISSN
- 18809014
- 05328799
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- NDL書誌ID
- 6449558
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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