Title :
Analysis of the Domain Wall Motion in the Ion Irradiated Amorphous Ribbon
Author :
Park, D.G. ; Song, H. ; Park, C.Y. ; Angani, C.S. ; Kim, C.G. ; Cheong, Y.M.
Author_Institution :
Korea Atomic Energy Res. Inst., Daejeon, South Korea
Abstract :
The mechanism of abrupt increase of the giant magneto impedance (GMI) ratio in the ion irradiated Co-based amorphous ribbon has been investigated. The GMI-ratio considerably increased in the ion irradiated samples and the GMI response showed strong dependence on the driving frequencies. The Barkhausen noise (BN) signals are decreased up to 46% for the Ar ion irradiated sample with energy of 100 keV. The power spectrum density of BN was decreased with increasing ion bombardment energy. The results are interpreted in terms of permeability variation associated with domain wall dynamics.
Keywords :
Barkhausen effect; amorphous magnetic materials; boron alloys; cobalt alloys; giant magnetoresistance; ion beam effects; iron alloys; magnetic domain walls; silicon alloys; Barkhausen noise signals; Co66Fe4B15Si15; domain wall motion; ion irradiated amorphous ribbon; permeability variation; power spectrum density; Barkhausen noise; domain wall pinning; giant magneto impedance (GMI); ion irradiation; permeability;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2009.2024878
