Engineering skyrmions in transition-metal multilayers for spintronics

被引：107

作者：

Dupe, B. ^{[1
,2
,3
,4
]}

Bihlmayer, G. ^{[2
,3
,4
]}

Boettcher, M. ^{[1
]}

Bluegel, S. ^{[2
,3
,4
]}

Heinze, S. ^{[1
]}

机构：

[1] Univ Kiel, Inst Theoret Phys & Astrophys, Leibnizstr 15, D-24098 Kiel, Germany

[2] Forschungszentrum Julich, PGI 1, D-52425 Julich, Germany

[3] Forschungszentrum Julich, IAS 1, D-52425 Julich, Germany

[4] JARA, D-52425 Julich, Germany

来源：

NATURE COMMUNICATIONS | 2016年 / 7卷

关键词：

MAGNETIC SKYRMIONS; DYNAMICS; LATTICE; MOTION; STATES;

D O I：

10.1038/ncomms11779

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Magnetic skyrmions are localized, topologically protected spin structures that have been proposed for storing or processing information due to their intriguing dynamical and transport properties. Important in terms of applications is the recent discovery of interface stabilized skyrmions as evidenced in ultra-thin transition-metal films. However, so far only skyrmions at interfaces with a single atomic layer of a magnetic material were reported, which greatly limits their potential for application in devices. Here we predict the emergence of skyrmions in [4d/Fe-2/5d](n) multilayers, that is, structures composed of Fe biatomic layers sandwiched between 4d and 5d transition-metal layers. In these composite structures, the exchange and the Dzyaloshinskii-Moriya interactions that control skyrmion formation can be tuned separately by the two interfaces. This allows engineering skyrmions as shown based on density functional theory and spin dynamics simulations.

引用

页数：6

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