Title :
Induced Giant Magnetoimpedance Effect by Current Annealing in Ultra Thin Co-Based Amorphous Ribbons
Author :
Ipatov, Mihail ; Gonzalez-Legarreta, Lorena ; Garcia, J. ; Chizhik, Alexander ; Dominguez, Luis ; Zhukova, Valentina ; Zhukov, Arcady ; Hernando, Blanca ; Gonzalez, Jose
Author_Institution :
Dept. of Mater. Phys., Univ. of the Basque Country, San Sebastian, Spain
Abstract :
We have studied the magnetoimpedance (MI) response of near-zero magnetostriction (Co0.95Fe0.05)75Si10B15 (Co-based) amorphous ribbons (0.50 mm wide, 32 μm thick), thermally treated by current annealing, for different dc current of intensity varying from 440-680 mA during 5 min, was investigated in the frequency range of 10 MHz-1 GHz. It was not observed MI effect in the as-quenched ribbon, while the current annealed ribbons display large MI depending on the current annealing intensity in a similar way to that of the inhomogeneous induced magnetic anisotropy developed by this peculiar thermal treatment.
Keywords :
amorphous magnetic materials; annealing; boron alloys; cobalt alloys; giant magnetoresistance; induced anisotropy (magnetic); iron alloys; quenching (thermal); silicon alloys; soft magnetic materials; (Co0.95Fe0.05)75Si10B15; current 440 mA to 680 mA; current annealed ribbons; current annealing intensity; dc current; frequency 10 MHz to 1 GHz; induced giant magnetoimpedance effect; inhomogeneous induced magnetic anisotropy; magnetoimpedance response; near-zero magnetostriction Co-based amorphous ribbons; quenched ribbon; size 0.50 mm; size 32 mum; thermal treatment; time 5 min; ultrathin Co-based amorphous ribbons; Amorphous magnetic materials; Annealing; Impedance; Magnetostriction; Perpendicular magnetic anisotropy; Soft magnetic materials; Induced magnetic anisotropy; magnetoimpedance effect; soft amorphous magnetic alloy ribbons;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2012.2228473
