High saturation magnetization and soft magnetic properties of nanocrystalline (Fe,Co)90Zr7B3 alloys annealed under a rotating magnetic field

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作者：
Suzuki, K. [1 ]
Ito, N. [2 ]
Garitaonandia, J.S. [1 ,3 ]
Cashion, J.D. [2 ]
机构：
[1] Department of Materials Engineering, Monash University, Vic. 3800, Australia
[2] School of Physics, Monash University, Vic. 3800, Australia
[3] Fisika Aplikarua II Saila, Euskal Herriko Unibertsitatea, UPV-EHU, Bilbao E-48080, Spain
来源：
Journal of Applied Physics | 2006年 / 99卷 / 08期
关键词：
The effects of magnetic-field annealing on the soft magnetic properties of nanocrystalline (Fe1-x Cox) 90 Zr7 B3 (x=0; 0.1; 0.2; and 0.3) have been investigated. The annealing-induced uniaxial anisotropy (Ku) in these alloys was found to follow an x2 dependence and Ku appears to reflect the population density of Co-Co atomic pairs. The annealing-induced anisotropy is suppressed by applying a rotating field during annealing and the coercivity is reduced by up to 60%. Nanocrystalline (Fe0.8 Co0.2) 90 Zr7 B3 annealed under a rotating field of 640 kAm exhibits a low coercivity of 9.1 Am and high permeability values (under 0.4 Am) of 4500 at 1 kHz and 3100 at 100 kHz along with a high saturation magnetization of 1.74 T. These permeability values are comparable to those of Fe-based amorphous alloys while the saturation magnetization is clearly higher than those of amorphous or nanocrystalline soft magnetic alloy ribbons developed to date. © 2006 American Institute of Physics;
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