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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) (SC-22); 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. doi: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. doi: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. doi: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
DOI: 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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Works referenced in this record:

Field-driven evolution of chiral spin textures in a thin helimagnet nanodisk
journal, January 2013


Noncentrosymmetric Magnets Hosting Magnetic Skyrmions
journal, March 2017

  • Kanazawa, Naoya; Seki, Shinichiro; Tokura, Yoshinori
  • Advanced Materials, Vol. 29, Issue 25
  • DOI: 10.1002/adma.201603227

Skyrmion oscillations in magnetic nanorods with chiral interactions
journal, January 2017


Chiral Surface Twists and Skyrmion Stability in Nanolayers of Cubic Helimagnets
journal, August 2016


Theory of vortex states in magnetic nanodisks with induced Dzyaloshinskii-Moriya interactions
journal, October 2009


Edge-mediated skyrmion chain and its collective dynamics in a confined geometry
journal, October 2015

  • Du, Haifeng; Che, Renchao; Kong, Lingyao
  • Nature Communications, Vol. 6, Issue 1
  • DOI: 10.1038/ncomms9504

Robust Zero-Field Skyrmion Formation in FeGe Epitaxial Thin Films
journal, January 2017


Skyrmions on the track
journal, March 2013

  • Fert, Albert; Cros, Vincent; Sampaio, João
  • Nature Nanotechnology, Vol. 8, Issue 3
  • DOI: 10.1038/nnano.2013.29

Ground state search, hysteretic behaviour and reversal mechanism of skyrmionic textures in confined helimagnetic nanostructures
journal, November 2015

  • Beg, Marijan; Carey, Rebecca; Wang, Weiwei
  • Scientific Reports, Vol. 5, Issue 1
  • DOI: 10.1038/srep17137

A new class of chiral materials hosting magnetic skyrmions beyond room temperature
journal, July 2015

  • Tokunaga, Y.; Yu, X. Z.; White, J. S.
  • Nature Communications, Vol. 6, Issue 1
  • DOI: 10.1038/ncomms8638

New Type of Stable Particlelike States in Chiral Magnets
journal, September 2015


Skyrmion Lattice in a Chiral Magnet
journal, February 2009


Electron tomography and holography in materials science
journal, April 2009

  • Midgley, Paul A.; Dunin-Borkowski, Rafal E.
  • Nature Materials, Vol. 8, Issue 4
  • DOI: 10.1038/nmat2406

Unwinding of a Skyrmion Lattice by Magnetic Monopoles
journal, May 2013


Direct imaging of magnetic field-driven transitions of skyrmion cluster states in FeGe nanodisks
journal, April 2016

  • Zhao, Xuebing; Jin, Chiming; Wang, Chao
  • Proceedings of the National Academy of Sciences, Vol. 113, Issue 18
  • DOI: 10.1073/pnas.1600197113

Control of morphology and formation of highly geometrically confined magnetic skyrmions
journal, June 2017

  • Jin, Chiming; Li, Zi-An; Kovács, András
  • Nature Communications, Vol. 8, Issue 1
  • DOI: 10.1038/ncomms15569

Magnetic vortex core reversal by excitation of spin waves
journal, April 2011

  • Kammerer, Matthias; Weigand, Markus; Curcic, Michael
  • Nature Communications, Vol. 2, Issue 1
  • DOI: 10.1038/ncomms1277

Observation of the Magnetic Skyrmion Lattice in a MnSi Nanowire by Lorentz TEM
journal, July 2013

  • Yu, Xiuzhen; DeGrave, John P.; Hara, Yuka
  • Nano Letters, Vol. 13, Issue 8
  • DOI: 10.1021/nl401687d

Spintronics via non-axisymmetric chiral skyrmions
journal, October 2016

  • Leonov, A. O.; Loudon, J. C.; Bogdanov, A. N.
  • Applied Physics Letters, Vol. 109, Issue 17
  • DOI: 10.1063/1.4965981

Magnetic vortex cores as tunable spin-wave emitters
journal, July 2016

  • Wintz, Sebastian; Tiberkevich, Vasil; Weigand, Markus
  • Nature Nanotechnology, Vol. 11, Issue 11
  • DOI: 10.1038/nnano.2016.117

Target-skyrmions and skyrmion clusters in nanowires of chiral magnets
journal, January 2014


Dynamics of skyrmionic states in confined helimagnetic nanostructures
journal, January 2017


Magnetic vortex with skyrmionic core in a thin nanodisk of chiral magnets
journal, February 2013


Switching of a target skyrmion by a spin-polarized current
journal, March 2015


Near room-temperature formation of a skyrmion crystal in thin-films of the helimagnet FeGe
journal, December 2010

  • Yu, X. Z.; Kanazawa, N.; Onose, Y.
  • Nature Materials, Vol. 10, Issue 2
  • DOI: 10.1038/nmat2916

Helical Spin Arrangement in Cubic FeGe
journal, January 1970


The stability of vortex-like structures in uniaxial ferromagnets
journal, April 1999


Topological properties and dynamics of magnetic skyrmions
journal, December 2013


Mechanisms for the symmetric and antisymmetric switching of a magnetic vortex core: Differences and common aspects
journal, January 2015


Resonant properties of dipole skyrmions in amorphous Fe/Gd multilayers
journal, June 2017


Skyrmion confinement in ultrathin film nanostructures in the presence of Dzyaloshinskii-Moriya interaction
journal, November 2013


Magnetic Vortex Core Observation in Circular Dots of Permalloy
journal, August 2000


Three-dimensional skyrmion states in thin films of cubic helimagnets
journal, March 2013


Real-space observation of a two-dimensional skyrmion crystal
journal, June 2010


Zero-Field Skyrmions with a High Topological Number in Itinerant Magnets
journal, April 2017


    Works referencing / citing this record:

    Quantification of Magnetic Surface and Edge States in an FeGe Nanostripe by Off-Axis Electron Holography
    journal, April 2018


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