Magnetostatic twists in room-temperature skyrmions explored by nitrogen-vacancy center spin texture reconstruction

Nature Communications
Y DovzhenkoA Yacoby

Abstract

Magnetic skyrmions are two-dimensional non-collinear spin textures characterized by an integer topological number. Room-temperature skyrmions were recently found in magnetic multilayer stacks, where their stability was largely attributed to the interfacial Dzyaloshinskii-Moriya interaction. The strength of this interaction and its role in stabilizing the skyrmions is not yet well understood, and imaging of the full spin structure is needed to address this question. Here, we use a nitrogen-vacancy centre in diamond to measure a map of magnetic fields produced by a skyrmion in a magnetic multilayer under ambient conditions. We compute the manifold of candidate spin structures and select the physically meaningful solution. We find a Néel-type skyrmion whose chirality is not left-handed, contrary to preceding reports. We propose skyrmion tube-like structures whose chirality rotates through the film thickness. We show that NV magnetometry, combined with our analysis method, provides a unique tool to investigate this previously inaccessible phenomenon.

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Citations

Feb 9, 2019·Advanced Materials·Wenjing LiGisela Schütz
Nov 9, 2019·Physical Review Letters·Juriaan LucassenRembert A Duine
Jul 24, 2018·Science Advances·William LegrandAlbert Fert
Jul 25, 2019·Nature Communications·Kangwei XiaQuan Li
Sep 19, 2018·Nature Nanotechnology·Lucas CarettaGeoffrey S D Beach
Jun 6, 2020·Physical Review Letters·Mariëlle J MeijerRembert A Duine
Nov 17, 2020·Small·Zhi Shiuh LimAriando Ariando
Nov 13, 2020·Science Advances·Iacopo BertelliToeno van der Sar
Jun 4, 2021·ACS Central Science·Chung-Jui YuDanna E Freedman
Jun 17, 2021·Proceedings of the National Academy of Sciences of the United States of America·Tony X ZhouAmir Yacoby
Jul 5, 2021·Advanced Materials·Ankit K SharmaStuart S P Parkin
Aug 19, 2020·ACS Nano·Jin TangHaifeng Du
Nov 6, 2020·ACS Nano·A V OgnevA S Samardak
Feb 13, 2020·Chemical Reviews·Michael N R AshfoldChloe V Peaker
Aug 24, 2021·Physical Review Letters·Christina Psaroudaki, Christos Panagopoulos
Dec 23, 2021·Nano Letters·Mariia StepanovaDennis Meier
Jan 4, 2022·Advanced Science·Xiaoye ChenAnjan Soumyanarayanan

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Methods Mentioned

BETA
Electron
electron beam
X-ray
circular
scanning tunnelling microscopy
electron beam lithography

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