Title :
Magnetic properties of Co70.3Si15B10 Fe4.7 amorphous powders from crystalline ribbons
Author :
Kaczmarek, W.A. ; Calka, A. ; Ninham, B.W.
Author_Institution :
Res. Sch. of Phys. Sci. & Eng., Australian Nat. Univ., Canberra, ACT, Australia
fDate :
11/1/1993 12:00:00 AM
Abstract :
Amorphous and magnetically soft Co70.3Si15B 10Fe4.7 alloy can be fabricated in powder form from fully crystallized glassy ribbons using a low energy ball milling technique. Magnetic saturation and anisotropy fields of as-milled and annealed powders are measured and compared with values obtained for amorphous and crystallized ribbons. All magnetic properties of powders are generally similar to those of metallic glassy ribbons, but can be easily modified by the preparation process. Prolonged milling decreases the particle size from 10 to 0.1 μm and an increase in coercivity is observed. In wet conditions (hexane), and by application of surfactant during the milling process in the material, a considerable decrease in magneto-crystalline anisotropy is found
Keywords :
amorphous state; annealing; boron alloys; cobalt alloys; coercive force; ferromagnetic properties of substances; iron alloys; magnetic anisotropy; magnetic properties of amorphous substances; magnetic properties of fine particles; powder metallurgy; silicon alloys; Co70.3Si15B10Fe4.7 amorphous powders; annealed powders; coercivity; crystallized ribbons; fully crystallized glassy ribbons; hexane; low energy ball milling technique; magnetic anisotropy fields; magnetic properties; magnetic saturation fields; magnetically soft Co70.3Si15B10Fe4.7 alloy; magneto-crystalline anisotropy; metallic glassy ribbons; particle size; powder form; preparation process; surfactant; wet conditions; Amorphous magnetic materials; Amorphous materials; Anisotropic magnetoresistance; Crystallization; Magnetic anisotropy; Magnetic properties; Milling; Perpendicular magnetic anisotropy; Powders; Saturation magnetization;
Journal_Title :
Magnetics, IEEE Transactions on
