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Stabilization of Skyrmions in a Nanodisk Without an External Magnetic Field

Journal Article


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Abstract


  • We study, in the absence of a magnetic field, the stability of skyrmions in a disk-shaped ferromagnetic multilayer in the presence of locally pinned spins at the edge. This particular boundary condition suppresses the formation of helical states yet enhances the stabilization of states with rotational symmetry, such as Neél skyrmions. Numerical simulation shows that the size of the disk is a viable parameter to control the creation and annihilation of skyrmionic states. We also find that the demagnetization field renormalizes the Dzyaloshinskii-Moriya interaction. This study opens an alternative avenue to the generation, stabilization, and control of magnetic skyrmions in field-free heterostructures.

UOW Authors


  •   Li, Hang (external author)
  •   Akosa, Collins (external author)
  •   Yan, Peng (external author)
  •   Wang, Yuanxu (external author)
  •   Cheng, Zhenxiang

Publication Date


  • 2020

Citation


  • Li, H., Akosa, C. A., Yan, P., Wang, Y. & Cheng, Z. (2020). Stabilization of Skyrmions in a Nanodisk Without an External Magnetic Field. Physical Review Applied, 13 (3), 034046-1-034046-8.

Scopus Eid


  • 2-s2.0-85082865348

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=5156&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/4101

Start Page


  • 034046-1

End Page


  • 034046-8

Volume


  • 13

Issue


  • 3

Place Of Publication


  • United States

Abstract


  • We study, in the absence of a magnetic field, the stability of skyrmions in a disk-shaped ferromagnetic multilayer in the presence of locally pinned spins at the edge. This particular boundary condition suppresses the formation of helical states yet enhances the stabilization of states with rotational symmetry, such as Neél skyrmions. Numerical simulation shows that the size of the disk is a viable parameter to control the creation and annihilation of skyrmionic states. We also find that the demagnetization field renormalizes the Dzyaloshinskii-Moriya interaction. This study opens an alternative avenue to the generation, stabilization, and control of magnetic skyrmions in field-free heterostructures.

UOW Authors


  •   Li, Hang (external author)
  •   Akosa, Collins (external author)
  •   Yan, Peng (external author)
  •   Wang, Yuanxu (external author)
  •   Cheng, Zhenxiang

Publication Date


  • 2020

Citation


  • Li, H., Akosa, C. A., Yan, P., Wang, Y. & Cheng, Z. (2020). Stabilization of Skyrmions in a Nanodisk Without an External Magnetic Field. Physical Review Applied, 13 (3), 034046-1-034046-8.

Scopus Eid


  • 2-s2.0-85082865348

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=5156&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/4101

Start Page


  • 034046-1

End Page


  • 034046-8

Volume


  • 13

Issue


  • 3

Place Of Publication


  • United States