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Skyrmions at the Edge: Confinement Effects in Fe/Ir(111).
Hagemeister, Julian; Iaia, Davide; Vedmedenko, Elena Y; von Bergmann, Kirsten; Kubetzka, André; Wiesendanger, Roland.
Afiliación
  • Hagemeister J; Department of Physics, University of Hamburg, D-20355 Hamburg, Germany.
  • Iaia D; Department of Physics, University of Hamburg, D-20355 Hamburg, Germany.
  • Vedmedenko EY; Department of Physics, University of Hamburg, D-20355 Hamburg, Germany.
  • von Bergmann K; Department of Physics, University of Hamburg, D-20355 Hamburg, Germany.
  • Kubetzka A; Department of Physics, University of Hamburg, D-20355 Hamburg, Germany.
  • Wiesendanger R; Department of Physics, University of Hamburg, D-20355 Hamburg, Germany.
Phys Rev Lett ; 117(20): 207202, 2016 Nov 11.
Article en En | MEDLINE | ID: mdl-27886488
We have employed spin-polarized scanning tunneling microscopy and Monte Carlo simulations to investigate the effect of lateral confinement onto the nano-Skyrmion lattice in Fe/Ir(111). We find a strong coupling of one diagonal of the square magnetic unit cell to the close-packed edges of Fe nanostructures. In triangular islands this coupling in combination with the mismatching symmetries of the islands and of the square nano-Skyrmion lattice leads to frustration and triple-domain states. In direct vicinity to ferromagnetic NiFe islands, the surrounding Skyrmion lattice forms additional domains. In this case a side of the square magnetic unit cell prefers a parallel orientation to the ferromagnetic edge. These experimental findings can be reproduced and explained by Monte Carlo simulations. Here, the single-domain state of a triangular island is lower in energy, but nevertheless multidomain states occur due to the combined effect of entropy and an intrinsic domain wall pinning arising from the skyrmionic character of the spin texture.
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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2016 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Estados Unidos
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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2016 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Estados Unidos