Detection of Local Oersted Field Generated at the Junction Between Ferromagnetic Nanowire and Electrode

Title
Detection of Local Oersted Field Generated at the Junction Between Ferromagnetic Nanowire and Electrode
Authors
문경웅이재철이긍원신경호최석봉
Keywords
Electrode; magnetization reversal; nanowire; Oersted field
Issue Date
2011-10
Publisher
IEEE transactions on magnetics
Citation
VOL 47, 2508-2510
Abstract
We report local concentration of the Oersted field at the junction of electric contact geometry. The local Oersted field is numerically calculated with a simplified analytical model. This local field is then verified experimentally by observing magnetization reversal due to the current injection into Permalloy nanowires under magnetic field bias. The threshold current of magnetization reversal is found to be linearly dependent on the strength of the magnetic-field bias with a proportional coefficient (6.9 ± 0.2)) x 10-11 Oe-㎡/A, which provides evidence of the local concentration of the Oersted field at the junction.
URI
http://pubs.kist.re.kr/handle/201004/45664
ISSN
0018-9464
Appears in Collections:
KIST Publication > Article
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