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Motion tracking of 80-nm-size skyrmions upon directional current injections.

Abstract：

:Nanometer-scale skyrmions are prospective candidates for information bits in low-power consumption devices owing to their topological nature and controllability with low current density. Studies on skyrmion dynamics in different classes of materials have exploited the topological Hall effect and current-driven fast motion of skyrmionic bubbles. However, the small current track motion of a single skyrmion and few-skyrmion aggregates remains elusive. Here, we report the tracking of creation and extinction and motion of 80-nm-size skyrmions upon directional one-current pulse excitations at low current density of the order of 109 A m-2 in designed devices with the notched hole. The Hall motion of a single skyrmion and the torque motions of few-skyrmion aggregates have been directly revealed. The results exemplify low-current density controls of skyrmions, which will pave the way for the application of skyrmions.

journal_name

Sci Adv

journal_title

Science advances

authors

Yu XZ,Morikawa D,Nakajima K,Shibata K,Kanazawa N,Arima T,Nagaosa N,Tokura Y

doi

10.1126/sciadv.aaz9744

subject

Has Abstract

pub_date

2020-06-17 00:00:00

pages

eaaz9744

issue

25

issn

2375-2548

pii

aaz9744

journal_volume

6

pub_type

杂志文章

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