Real-space observation of skyrmion lattice in helimagnet MnSi thin samples

Akira Tonomura, Xiuzhen Yu, Keiichi Yanagisawa, Tsuyoshi Matsuda, Yoshinori Onose, Naoya Kanazawa, Hyun Soon Park, Yoshinori Tokura

Research output: Contribution to journalArticlepeer-review

245 Citations (Scopus)


Observing and characterizing the spin distributions on a nanometer scale are of vital importance for understanding nanomagnetism and its application to spintronics. The magnetic structure in MnSi thin samples prepared from a bulk, which undergoes a transition from a helix to a skyrmion lattice, was investigated by in situ observation using Lorentz microscopy. Stripe domains were observed at zero applied field below 22.5 K. A skyrmion lattice with 6-fold symmetry in real space appeared when a field of 0.18 T was applied normal to the film plane. The lattice constant was estimated to be 18 nm, almost identical to the helical period. In comparison with the marginally stable skyrmion phase in a bulk sample, the skyrmion phase was stable over a wide range of temperatures and magnetic fields in the thin samples.

Original languageEnglish
Pages (from-to)1673-1677
Number of pages5
JournalNano Letters
Issue number3
Publication statusPublished - 2012 Mar 14
Externally publishedYes


  • Skyrmion
  • helimagnet
  • in situ Lorentz microscopy
  • magnetic phase diagram
  • nanomagnetism
  • topological spin texture

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering


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