Title :
Magnetization dynamics of pinned domain walls in partially crystallized ribbons
Author :
Betancourt, I. ; Valenzuela, R.
Author_Institution :
Inst. for Mater. Res., Nat. Univ. of Mexico, Mexico
fDate :
9/1/1997 12:00:00 AM
Abstract :
The frequency dependence of the permeability of Co- and Fe-rich amorphous ribbons (Vitrovac 6025(R) and Metglas(R) 2605 SC, respectively), submitted to a variety of thermal treatments involving different degrees of crystallization, was measured in the 5 Hz-13 MHz frequency range. The quasi-static initial permeability, μi, and the domain wall relaxation frequency, fx, exhibited an inverse relationship, μi·fx=constant. These results are interpreted in terms of variations in the average distance between pinning points of domain walls, and the effects of such variations on the vibrational properties of pinned domain walls
Keywords :
amorphous magnetic materials; boron alloys; cobalt alloys; crystallisation; ferromagnetic materials; heat treatment; iron alloys; magnetic domain walls; magnetic permeability; magnetisation; metallic glasses; molybdenum alloys; silicon alloys; 5 Hz to 13 MHz; Co-rich amorphous ribbons; Co66Fe4Mo2B12Si 16; Fe-rich amorphous ribbons; Fe81B13.5Si3.5C2; Metglas 2605 SC; Vitrovac 6025; domain wall pinning points; domain wall relaxation frequency; magnetization dynamics; partially crystallized ribbons; pinned domain walls; quasi-static initial permeability; thermal treatments; vibrational properties; Amorphous materials; Annealing; Crystallization; Frequency measurement; Impedance; Magnetic analysis; Magnetic domain walls; Magnetic properties; Magnetization; Permeability;
Journal_Title :
Magnetics, IEEE Transactions on
