Distinct stochasticities between ferromagnetic domain-wall motions driven by magnetic field and electric current

Title
Distinct stochasticities between ferromagnetic domain-wall motions driven by magnetic field and electric current
Authors
민병철김덕호박용근Yune-Seok NamDae-Yun KimMin-Ho ParkJoo-Sung KimSug-Bong Choe
Issue Date
2018-04
Publisher
Applied physics letters
Citation
VOL 112, NO 17-172401-4
Abstract
We report the experimental observation of distinct stochasticities between domain-wall motions driven by either a magnetic field or an electric current. In Pt/Co/Ta trilayer films, the arrival time of the current-induced domain-wall motion has a much broader dispersion compared to that of the fieldinduced motion. Images of the magneto-optical Kerr effect microscope reveal that the currentinduced motion experiences significantly stronger domain-wall pinning, contrary to the field-induced domain-wall motion, even though both types of motion take place in the same area of the film. Consequently, the former exhibits stepwise propagation in time, whereas the behavior of the latter is smooth and monotonic. A simple analytic model based on depinning statistics is proposed to explain the relationship between the wide dispersion and the strong pinning mechanisms in current-induced domain-wall motion.
URI
http://pubs.kist.re.kr/handle/201004/67636
ISSN
0003-6951
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE