DocumentCode
1449092
Title
Magnetization reversal in mesoscopic Ni80Fe20 wires: a magnetic domain launching device
Author
Lee, W.Y. ; Hirohata, A. ; Leung, H.T. ; Xu, Y.B. ; Gardiner, S.M. ; Yao, C.C. ; Bland, J.A.C.
Author_Institution
Cavendish Lab., Cambridge Univ., UK
Volume
36
Issue
5
fYear
2000
fDate
9/1/2000 12:00:00 AM
Firstpage
3018
Lastpage
3020
Abstract
The magnetization reversal process in mesoscopic permalloy (Ni80Fe20) wire structures has been investigated using scanning Kerr microscopy, magnetic force microscopy (MFM) and micromagnetic calculations. We find that the junction offers a site for reversed domain wall nucleation in the narrow part of the wires. As a consequence, the switching field is dominated by the domain nucleation field and the junction region initiates reversal by the wall motion following the nucleation of domains. Our results suggest the possibility of designing structures that can be used to “launch” reverse domains in narrow wires within a controlled field range
Keywords
Kerr magneto-optical effect; Permalloy; ferromagnetic materials; interface magnetism; magnetic domain walls; magnetic domains; magnetic force microscopy; magnetic switching; magnetisation reversal; mesoscopic systems; Ni80Fe20; domain nucleation field; junction region; magnetic domain launching device; magnetic force microscopy; magnetization reversal; mesoscopic Ni80Fe20 wires; mesoscopic permalloy; micromagnetic calculations; narrow wires; reverse domains; reversed domain wall nucleation; scanning Kerr microscopy; switching field; wall motion; Iron; Magnetic domain walls; Magnetic domains; Magnetic force microscopy; Magnetic forces; Magnetic switching; Magnetization reversal; Micromagnetics; Shape; Wires;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/20.908661
Filename
908661
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