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IMPROVEMENT IN HIGH FREQUENCY MAGNETIC PROPERTIES OF THIN AMORPHOUS RIBBONS BY SURFACE OXIDATION
K.Ooae,H.Fukunaga,H.Kakehashi,H.Ogasawara 한국자기학회 1995 韓國磁氣學會誌 Vol.5 No.5
The effects of surface oxidation on magnetic properties were investigated at high frequencies (10k-10㎒) for 7-18㎛ thick Co_(70)Fe_5Si_(15)B_(10) amorphous ribbons with controlled domain structure. Oxidation was accelerated by acid-treatment or anodic oxidation treatment, and the insulation layers were prepared on the surfaces of the ribbons. The acid-treatment was effective in improving permeability and magnetic loss. Although the anodic oxidation treatment was effective in both making oxide layer and thinning, the magnetic properties were not improved compared with the case of the acid-treatment.