(Ni80Fe20)−(B2O3) 共蒸着薄膜の微細構造と電磁ノイズ抑制効果
(Ni80Fe20)−(B2O3) 共蒸着薄膜の微細構造と電磁ノイズ抑制効果
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(Ni80Fe20)−(B2O3)共沉积薄膜的微观结构及电磁噪声抑制效果
DOI：
10.3379/jmsjmag.28.401
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
寛 島田
中科院分区：
文献类型：
--
作者：
哲夫 伊藤;栄吉 吉田;聡 岡本;修 北上;寛 島田
已经证实，当将高磁导率颗粒膜放置在辐射RF噪声的电子设备附近时，其用作RF电磁噪声吸收剂。然而，它们有限的电阻率会引起涡流，将RF噪声重新辐射回源。在本文中，据报道，由Ni_（80）Fe_（20）和B_2O_3的共蒸发产生的薄膜具有非常薄的柱状结构，这导致非常高的电阻率。纳米结构是具有垂直于难磁化轴的面内方向的各向异性的薄柱的组装。该膜表现出作为RF噪声吸收器的显著特征，其相当于比膜厚50倍的常规噪声吸收片。
It has been verified that high permeability granular films work as RF electromagnetic noise absorbers when they are placed in the vicinity of electronic devices radiating RF noise. However their limited resistivity induces eddy current that re-radiates RF noise back to the source. In this paper it is reported that thin films produced by co-evaporation of Ni80Fe20 and B2O3 have a very thin columnar structure that leads to a very high resistivity. The nano-structure is an assembly of thin columns that have a perpendicular anisotropy with the hard axis in the in-plane direction. The films exhibit a remarkable feature as RF noise absorbers that are equivalent to the conventional noise absorbing sheets that are 50 times thicker than the films.