無電解Co合金皮膜の磁気特性に及ぼす熱処理の影響

概要

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Electroless films of Co-N (boron-free) alloy and three Co-B alloys having boron weight percentages of 1, 3 and 6wt% were prepared, and the effect of film composition and crystal structure on their magnetic properties was studied. It was found that in the Co-N alloy, film structure and magnetic properties were independent of heat treatment, while in the Co-B alloy films, an increase in boron weigt percentage increased the crystallization temperature under heat, treatment (1wt%: 200°C, 3wt%: 300°C, and 6wt%: 400°C) but decreased the coercive force, residual magnetic flux density and saturation magnetic flux. Maximum permeability also decreased with crystallization by heat treatment. It was also verified that the deposition of Co2 B under heat treatment affects the fine structure of the film and produces a significant increase in coercive force and residual magnetic flux density.
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