Title :
Giant magnetoimpedance in CoFeBSi wires and polycrystalline ferrites
Author :
Carrasco, E. ; Garcia, K.L. ; Valenzuela, R.
Author_Institution :
Inst. for Mater. Res., Univ. Nacional Autonoma de Mexico, Mexico City, Mexico
fDate :
7/1/1998 12:00:00 AM
Abstract :
Measurements of Giant magnetoimpedance (GMI) in Co-rich amorphous wires are compared with magnetic measurements in polycrystalline ZnMn ferrites as a function of frequency (5 Hz-13 MHz) and a superimposed dc magnetic field, aiming to simulate GMT conditions. It is found that, except for the scale differences expected in these two different materials, frequency phenomena are essentially similar. In particular, both properties set can be represented by using the same equivalent-circuit approach. These results point to a domain wall damping effect of the dc field, and a reduced role of macroscopic eddy currents
Keywords :
boron alloys; cobalt alloys; ferrites; giant magnetoresistance; iron alloys; magnetic thin films; manganese compounds; silicon alloys; zinc compounds; 5 Hz to 13 MHz; CoFeBSi; CoFeBSi wires; ZnMnFe2O4; giant magnetoimpedance; macroscopic eddy currents; polycrystalline ZnMn ferrites; polycrystalline ferrites; Amorphous magnetic materials; Amorphous materials; Damping; Ferrites; Frequency measurement; Magnetic domain walls; Magnetic field measurement; Magnetic materials; Magnetic variables measurement; Wires;
Journal_Title :
Magnetics, IEEE Transactions on
