Title :
Processing of magnetic properties of nearly zero magnetostrictive glass-coated microwires by current annealing
Author :
Zhukova, Valentina A. ; Zhukov, Arcady P. ; González, Julian ; Blanco, Juan M. ; Vázquez, Manuel
Author_Institution :
TAMag Iberica S.L., Madrid, Spain
Abstract :
The effect of dc current annealing (with length up to 80 min and current density j up to 250 A/mm2), with or without dc axial magnetic field, on the magnetic properties of Co55.7Fe5.9Ni9.9B17.7Si10.8 and Co68Mn7Si10B15 glass-coated microwires has been studied. Such thermal treatments, especially performed under magnetic field, modify the magnetic parameters, such as coercivity, remanent magnetization, magnetic permeability, and overall shape of the hysteresis loops. Such phenomenology can be interpreted by considering the noticeable longitudinal magnetic anisotropy induced by the combined effects of the magnetic field and internal stresses arising from the coating during the thermal treatment.
Keywords :
annealing; boron alloys; cobalt alloys; coercive force; induced anisotropy (magnetic); internal stresses; iron alloys; magnetic devices; magnetic hysteresis; magnetic permeability; magnetoelastic effects; magnetoresistive devices; manganese alloys; nickel alloys; remanence; silicon alloys; wires (electric); 80 min; Co55.7Fe5.9Ni9.9B17.7Si10.8; Co68Mn7Si10B15; amorphous microwires; coercivity; dc axial magnetic field; dc current annealing; glass-coated microwires; heat treatment; hysteresis loop shape; induced longitudinal magnetic anisotropy; internal stresses; magnetic permeability; magnetoelastic anisotropy; microwire magnetic properties processing; nearly zero magnetostrictive microwires; remanent magnetization; thermal treatment; Annealing; Coercive force; Current density; Iron; Magnetic anisotropy; Magnetic fields; Magnetic properties; Magnetization; Magnetostriction; Perpendicular magnetic anisotropy;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.815886
