Fe-Ni合金電析膜の微細構造と磁気特性

概要

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The relationship between the microstructure and magnetic properties of electrodeposited Fe-Ni binary alloy thin films throughout the composition range was investigated. In such films an α(bcc)phase existed up to 15 at%Ni, a γ(fcc)phase existed beyond 35 at%Ni, and a mixed phase of α and γ existed from 15 to 35 at%Ni. The grain size of a film depended on the alloy composition without potential and the current density. The grain size of the α phase increased with the Fe content, while the grain size of the γ phase increased with the Ni content; therefore, the grain size of the mixed phase was the finest(<10 nm)in all the obtained films. The saturated magnetization was proportional to the alloy composition. Dependence of the coercivity on the thickness and coercivity of thinner films(<500 nm)was strongly affected by the grain size.
1998-09-01