Maximizing domain-wall speed via magnetic anisotropy adjustment in Pt/Co/Pt films

Title
Maximizing domain-wall speed via magnetic anisotropy adjustment in Pt/Co/Pt films
Authors
김덕호유상철김대윤문경웅제숭근조정구민병철최석봉
Issue Date
2014-04
Publisher
Applied physics letters
Citation
VOL 104, NO 14, 142410-1-142410-3
Abstract
We report an experimental observation that indicates that a direct relation exists between the speed of the magnetic domain-wall (DW) motion and the magnitude of the perpendicular magnetic anisotropy (PMA) in Pt/Co/Pt films. It is found that by changing the thicknesses of the nonmagnetic Pt layers, the PMA magnitude can be varied significantly and the field-driven DW speed can also be modified by a factor of up to 50 under the same magnetic field. Interestingly, the DW speed exhibits a clear scaling behavior with respect to the PMA magnitude. A theory based on the DW creep criticality successfully explains the observed scaling exponent between the DW speed and the PMA magnitude. The presented results offer a method of maximizing the DW speed in DW-mediated nanodevices without altering the thickness of the magnetic Co layer.
URI
http://pubs.kist.re.kr/handle/201004/47454
ISSN
00036951
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