DocumentCode :
1434394
Title :
Dependence of Transverse Domain Wall Dynamics on Permalloy Nanowire Dimensions
Author :
Bryan, Matthew T. ; Schrefl, Thomas ; Allwood, Dan A.
Author_Institution :
Dept. of Eng. Mater., Univ. of Sheffield, Sheffield, UK
Volume :
46
Issue :
5
fYear :
2010
fDate :
5/1/2010 12:00:00 AM
Firstpage :
1135
Lastpage :
1138
Abstract :
Micromagnetic modeling was used to investigate transverse domain wall propagation through Permalloy nanowires of width, w, between 10 and 120 nm and thickness, T, between 2 and 20 nm. The transverse wall mobility below Walker breakdown, ??, and Walker breakdown field, H w, depended on the exact wire dimensions, rather than simply a function of w/T, as suggested by 1-D analytical modeling. Empirical equations describing the w and T dependence of ?? and H w were found from the micromagnetic data. As the model makes no assumptions about magnetization uniformity, these equations provide a generic description of ?? and H w for transverse domain walls in Ni80Fe20 nanowires.
Keywords :
Permalloy; magnetic domain walls; micromagnetics; nanowires; 1D analytical micromagnetic modeling; Ni80Fe20; Permalloy nanowires; Walker breakdown field; empirical equations; exact wire dimension dependence; size 2 nm to 120 nm; transverse domain wall dynamics; transverse domain wall mobility; transverse domain wall propagation; Mobility; Walker breakdown; thickness; transverse domain wall; width;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2010.2040622
Filename :
5427074
Link To Document :
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