Title :
Temperature effect on the asymmetric giant magnetoimpedance in amorphous materials
Author :
Rheem, Young Woo ; Kim, Cheol Gi ; Kim, Chong-Oh ; Kim, Gun Woo ; Yoon, Seok Soo
Author_Institution :
Dept. of Mater. Eng., Chungnam Nat. Univ., Daejeon, South Korea
fDate :
9/1/2002 12:00:00 AM
Abstract :
The asymmetric giant magnetoimpedance (GMI) curve has been measured under the rotating field as a function of temperature in a Co-based amorphous ribbon (Co66Fe4B15Si15). The magnetic softness in the amorphous phase is enhanced at temperature between 370 and 415 K. The bias-field caused by the hard magnetic phase is nearly constant up to 350 K and then rapidly decreases with temperature. The field angle of 95° from the ribbon axis for maximum impedance increases to 97° at a temperature of 440 K, indicating little change of anisotropy configurations with temperature.
Keywords :
amorphous magnetic materials; boron alloys; cobalt alloys; ferromagnetic materials; giant magnetoresistance; iron alloys; magnetic anisotropy; metallic glasses; silicon alloys; soft magnetic materials; 350 to 440 K; 370 to 415 K; Co-based amorphous ribbon; Co66Fe4B15Si15; amorphous materials; anisotropy configurations; asymmetric giant magnetoimpedance; bias-field; field angle; hard magnetic phase; magnetic softness; ribbon axis; rotating field; temperature dependence; temperature effect; Amorphous magnetic materials; Amorphous materials; Anisotropic magnetoresistance; Impedance; Iron; Magnetic anisotropy; Magnetic field measurement; Perpendicular magnetic anisotropy; Rotation measurement; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.802136
