THE HIGH-RESISTIVE SOFT MAGNETIC AMORPHOUS FILMS CONSISTING OF COBALT, IRON, BORON, SILICON, AND OXYGEN, UTILIZED FOR VIDEO HEAD DEVICES

被引:25
作者
MATSUYAMA, H
EGUCHI, H
KARAMON, H
机构
[1] Device R and D Division, Sony Magnetic Products Inc., Sony Corp., Tagajo
关键词
D O I
10.1063/1.344688
中图分类号
O59 [应用物理学];
学科分类号
摘要
A new type of high-resistive soft magnetic amorphous film possessing superior properties such as high resistivity (ρ), high-saturation induction (Bs), and high permeability (μ) in the high-frequency range prepared by cosputtering Co0.40Fe0.40B0.20- SiO2 was obtained. These films which have Bs higher than 8 kG in the range less than ∼55% of Si-O volume fraction, consist of a two-phase structure of amorphous magnetic metal particles (∼50 Å) scattered in the amorphous nonmagnetic Si-O region. ρ increases exponentially with the increase of Si-O volume, with diminishing eddy current loss in the very high-frequency range. Some of these films (Bs∼12 kG, Hc∼0.3 Oe, ρ∼500 μΩ cm), in fact, have a superior permeability compared with sputtered sendust films and regular amorphous films used as high-density recording head cores in the high-frequency range over 10 MHz.
引用
收藏
页码:5123 / 5125
页数:3
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