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Home > Issues > SearchImproving the Soft Magnetic Properties of Fe-Co-B-Zr-Nb Alloy by Tuning the Fe/Co Ratio
Journal of Magnetics, Volume 27, Number 3, 30 Sep 2022, Pages 293-297
Jihye Park (Department of Applied Physics, Sookmyung Women’s University), Haein Choi-Yim * 
(Department of Applied Physics, Sookmyung Women’s University)
(Department of Applied Physics, Sookmyung Women’s University)
Abstract
Amorphous (FexCo1-x)85B5ZryNb10-y (x = 0.6, 0.7, 0.8, or 0.9 and y = 7 or 8 at.%) ribbons were fabricated by the
melt-spinning technique, and their thermal and magnetic properties were investigated. The results showed that
all alloys had a fully amorphous structure, and the substitution of Zr for Nb resulted in high thermal stability
and high saturation flux density (Bs) with fairly low coercivity (Hc < 21 A/m). Moreover, by varying the Fe/Co
ratio, the optimum ratio with the highest Bs and low Hc was determined. As the Fe/Co ratio changed from 6:4
to 9:1, Hc decreased from approximately 20 to 9 A/m, and Bs also decreased gradually. A saturation flux density
of 1.33 T was achieved with a coercivity of 9 A/m after optimization.
melt-spinning technique, and their thermal and magnetic properties were investigated. The results showed that
all alloys had a fully amorphous structure, and the substitution of Zr for Nb resulted in high thermal stability
and high saturation flux density (Bs) with fairly low coercivity (Hc < 21 A/m). Moreover, by varying the Fe/Co
ratio, the optimum ratio with the highest Bs and low Hc was determined. As the Fe/Co ratio changed from 6:4
to 9:1, Hc decreased from approximately 20 to 9 A/m, and Bs also decreased gradually. A saturation flux density
of 1.33 T was achieved with a coercivity of 9 A/m after optimization.
Keywords: Fe-based; amorphous; soft magnetic material; ribbon
DOI: https://doi.org/10.4283/JMAG.2022.27.3.293
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