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Title: Direct Imaging of a Zero-Field Target Skyrmion and Its Polarity Switch in a Chiral Magnetic Nanodisk

Abstract

A target Skyrmion is a flux-closed spin texture that has twofold degeneracy and is promising as a binary state in next generation universal memories. Although its formation in nanopatterned chiral magnets has been predicted, its observation has remained challenging. Here, we use off-axis electron holography to record images of target Skyrmions in a 160-nm-diameter nanodisk of the chiral magnet FeGe. We compare experimental measurements with numerical simulations, demonstrate switching between two stable degenerate target Skyrmion ground states that have opposite polarities and rotation senses, and discuss the observed switching mechanism.

Authors:
; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Univ. of New Hampshire, Durham, NH (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); European Union (EU); National Key R&D Program of China; Natural Science Foundation of China (NSFC)
OSTI Identifier:
1408261
Alternate Identifier(s):
OSTI ID: 1498969
Grant/Contract Number:  
SC0016424; 2017YFA0303201; QYZDB-SSW-SLH009; 51622105; 11474290
Resource Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Name: Physical Review Letters Journal Volume: 119 Journal Issue: 19; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Zheng, Fengshan, Li, Hang, Wang, Shasha, Song, Dongsheng, Jin, Chiming, Wei, Wenshen, Kovács, András, Zang, Jiadong, Tian, Mingliang, Zhang, Yuheng, Du, Haifeng, and Dunin-Borkowski, Rafal E. Direct Imaging of a Zero-Field Target Skyrmion and Its Polarity Switch in a Chiral Magnetic Nanodisk. United States: N. p., 2017. Web. https://doi.org/10.1103/PhysRevLett.119.197205.
Zheng, Fengshan, Li, Hang, Wang, Shasha, Song, Dongsheng, Jin, Chiming, Wei, Wenshen, Kovács, András, Zang, Jiadong, Tian, Mingliang, Zhang, Yuheng, Du, Haifeng, & Dunin-Borkowski, Rafal E. Direct Imaging of a Zero-Field Target Skyrmion and Its Polarity Switch in a Chiral Magnetic Nanodisk. United States. https://doi.org/10.1103/PhysRevLett.119.197205
Zheng, Fengshan, Li, Hang, Wang, Shasha, Song, Dongsheng, Jin, Chiming, Wei, Wenshen, Kovács, András, Zang, Jiadong, Tian, Mingliang, Zhang, Yuheng, Du, Haifeng, and Dunin-Borkowski, Rafal E. Fri . "Direct Imaging of a Zero-Field Target Skyrmion and Its Polarity Switch in a Chiral Magnetic Nanodisk". United States. https://doi.org/10.1103/PhysRevLett.119.197205.
@article{osti_1408261,
title = {Direct Imaging of a Zero-Field Target Skyrmion and Its Polarity Switch in a Chiral Magnetic Nanodisk},
author = {Zheng, Fengshan and Li, Hang and Wang, Shasha and Song, Dongsheng and Jin, Chiming and Wei, Wenshen and Kovács, András and Zang, Jiadong and Tian, Mingliang and Zhang, Yuheng and Du, Haifeng and Dunin-Borkowski, Rafal E.},
abstractNote = {A target Skyrmion is a flux-closed spin texture that has twofold degeneracy and is promising as a binary state in next generation universal memories. Although its formation in nanopatterned chiral magnets has been predicted, its observation has remained challenging. Here, we use off-axis electron holography to record images of target Skyrmions in a 160-nm-diameter nanodisk of the chiral magnet FeGe. We compare experimental measurements with numerical simulations, demonstrate switching between two stable degenerate target Skyrmion ground states that have opposite polarities and rotation senses, and discuss the observed switching mechanism.},
doi = {10.1103/PhysRevLett.119.197205},
journal = {Physical Review Letters},
number = 19,
volume = 119,
place = {United States},
year = {2017},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevLett.119.197205

Citation Metrics:
Cited by: 30 works
Citation information provided by
Web of Science

Figures / Tables:

Figure 1 Figure 1: (a) and (b) Magnetization configurations of twofold-degenerate target Skyrmions for p = −1 and p = +1, respectively. (c) and (d) In-plane magnetization in the target Skyrmions in (a) and (b), respectively, with colors and arrows used to indicate the rotational sense of the in-plane magnetization, according tomore » the color wheel shown. The dashed black lines in (a) and (b) and the thin red lines in (c) and (d) mark the boundaries between the Skyrmions and the circular edge twists.« less

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      Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.