(Ni_<80>Fe_<20>)-(B_2O_3)共蒸着薄膜の微細構造と電磁ノイズ抑制効果(ソフト磁性材料)

概要

論文の詳細を見る
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 Ni_<80>Fe_<20>-B_2O_3 and B_2O_3 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.
社団法人日本磁気学会の論文
2004-03-01