Title :
Effects of magnetic field annealing on magnetic properties in ultrafine crystalline Fe-Cu-Nb-Si-B alloys
Author :
Yoshizawa, Y. ; Yamauchi, K.
Author_Institution :
Hitachi Metals Ltd., Saitama, Japan
fDate :
9/1/1989 12:00:00 AM
Abstract :
The relation between magnetic field annealing and magnetic properties in Fe-based alloys called FINEMET, composed of an ultrafine grain structure, have been studied. High-remanence-ratio B-H curves and flat B-H curves can be obtained by longitudinal-field and transverse-field annealing, respectively. The values of core loss and relative permeability of FINEMET alloys annealed in a magnetic field are similar to those of Co-based alloys, and they show excellent soft magnetic properties in the high-frequency range. The alloys annealed in longitudinal fields are suitable for saturable reactors and high-frequency transformers, and those annealed in transverse fields are suitable for choke coils
Keywords :
boron alloys; copper alloys; iron alloys; magnetic annealing; magnetic properties of fine particles; niobium alloys; silicon alloys; B-H curves; FINEMET; Fe-Cu-Nb-Si-B alloys; choke coils cores; core loss; high frequency transformer cores; high-frequency range; longitudinal field annealing; magnetic field annealing; magnetic properties; relative permeability; saturable reactor cores; soft magnetic properties; transverse-field annealing; ultrafine grain structure; Amorphous materials; Annealing; Conductivity; Core loss; Crystallization; Frequency dependence; Magnetic properties; Permeability; Remanence; Soft magnetic materials;
Journal_Title :
Magnetics, IEEE Transactions on
