Magnetostriction and Effective Magnetic Anisotropy of Nanocrystalline ${rm Ni}_{rm x}{({rm Fe}_{0.5}{rm Co}_{0.5})}_{73.5-{rm x}}{rm Cu}_{1}{rm Nb}_{3}{rm Si}_{13.5}{rm B}_{9}$ Alloys

摘要

Ni-content dependence on magnetostriction, effective magnetic anisotropy and initial permeability for as-quenched amorphous ${rm Ni}_{rm x}{({rm Fe}_{0.5}{rm Co}_{0.5})}_{73.5-{rm x}}{rm Nb}_{3}{rm Si}_{13.5}{rm B}_{9}{rm Cu}_{1}$ $({rm x}=0sim 30)$ alloys annealed at 500 $^{circ}{rm C}$ was investigated. XRD showed that all the amorphous samples were partially nanocrystallized after annealing and a two-phase nanocrystalline structure with $alpha$-FeCoNi(Si) and residual amorphous phase was formed. Ni-content exerts a significant effect on magnetostriction and effective magnetic anisotropy. With the increasing of Ni-content, the magnetostriction and effective magnetic anisotropy gradually decreases which results in the remarkable enhancement of initial permeability from $3000({rm x}=0)$ to $16000({rm x}=30)$.