Determination of the energy barrier and spin torque efficiency based on telegraph noise

Title
Determination of the energy barrier and spin torque efficiency based on telegraph noise
Authors
윤상준유상철최석봉민병철
Keywords
Domain wall; Depinning; Energy barrier; Telegraph noise; Current pulse
Issue Date
2014-11
Publisher
Journal of the Korean Physical Society
Citation
VOL 65, NO 10, 1607-1610
Abstract
The spin torque (ST) efficiency and energy barrier of domain wall (DW) depinning are investigated by analyzing the telegraph noise in nanostructured ferromagnetic Pt/Co/Pt films. The telegraph noise is generated by applying both a magnetic field and an electric current, whose forces on the DW oppose each other. Cumulating the DW depinning probability experimentally revealed that the DW depinning was governed by a single energy barrier, whose height was estimated to be about 1.0 × 10−19 J. The ST efficiency at the pinning site is estimated to be −4.6 × 10−14 T·㎡/A. The present analysis technique provides an alternative way to determine the ST efficiency in the short-current-pulse-driven DW motion at a single energy barrier.
URI
http://pubs.kist.re.kr/handle/201004/49179
ISSN
03744884
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