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Boulle O, Vogel J, Yang H, et al. Room-temperature chiral magnetic skyrmions in ultrathin magnetic nanostructures. Nat Nanotechnol. 2016;11(5):449-54doi: 10.1038/nnano.2015.315.
Boulle, O., Vogel, J., Yang, H., Pizzini, S., de Souza Chaves, D., Locatelli, A., Menteş, T. O., Sala, A., Buda-Prejbeanu, L. D., Klein, O., Belmeguenai, M., Roussigné, Y., Stashkevich, A., Chérif, S. M., Aballe, L., Foerster, M., Chshiev, M., Auffret, S., Miron, I. M., & Gaudin, G. (2016). Room-temperature chiral magnetic skyrmions in ultrathin magnetic nanostructures. Nature nanotechnology, 11(5), 449-54. https://doi.org/10.1038/nnano.2015.315
Boulle, Olivier, et al. "Room-temperature chiral magnetic skyrmions in ultrathin magnetic nanostructures." Nature nanotechnology vol. 11,5 (2016): 449-54. doi: https://doi.org/10.1038/nnano.2015.315
Boulle O, Vogel J, Yang H, Pizzini S, de Souza Chaves D, Locatelli A, Menteş TO, Sala A, Buda-Prejbeanu LD, Klein O, Belmeguenai M, Roussigné Y, Stashkevich A, Chérif SM, Aballe L, Foerster M, Chshiev M, Auffret S, Miron IM, Gaudin G. Room-temperature chiral magnetic skyrmions in ultrathin magnetic nanostructures. Nat Nanotechnol. 2016 May;11(5):449-54. doi: 10.1038/nnano.2015.315. Epub 2016 Jan 25. PMID: 26809057.
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Nat Nanotechnol. 2016 May;11(5):449-54. doi: 10.1038/nnano.2015.315. Epub 2016 Jan 25.

Room-temperature chiral magnetic skyrmions in ultrathin magnetic nanostructures.

Nature nanotechnology

Olivier Boulle, Jan Vogel, Hongxin Yang, Stefania Pizzini, Dayane de Souza Chaves, Andrea Locatelli, Tevfik Onur Menteş, Alessandro Sala, Liliana D Buda-Prejbeanu, Olivier Klein, Mohamed Belmeguenai, Yves Roussigné, Andrey Stashkevich, Salim Mourad Chérif, Lucia Aballe, Michael Foerster, Mairbek Chshiev, Stéphane Auffret, Ioan Mihai Miron, Gilles Gaudin

Affiliations

  1. Univ. Grenoble Alpes, SPINTEC, Grenoble F-38000, France.
  2. CNRS, SPINTEC, Grenoble F-38000, France.
  3. CEA, INAC-SPINTEC, Grenoble F-38000, France.
  4. CNRS, Institut Néel, 25 avenue des Martyrs, B.P. 166, Grenoble Cedex 9 38042, France.
  5. Univ. Grenoble Alpes, Institut Néel, 25 avenue des Martyrs, B.P. 166, Grenoble Cedex 9 38042, France.
  6. Elettra-Sincrotrone, S.C.p.A, S.S 14 - km 163.5 in AREA Science Park 34149 Basovizza, Trieste, Italy.
  7. LSPM (CNRS-UPR 3407), Université Paris 13, Sorbonne Paris Cité, 99 avenue Jean-Baptiste Clément, Villetaneuse 93430, France.
  8. ALBA Synchrotron Light Facility, Carretera BP 1413, Km. 3.3, Cerdanyola del Vallès, Barcelona 08290, Spain.

PMID: 26809057 DOI: 10.1038/nnano.2015.315

Abstract

Magnetic skyrmions are chiral spin structures with a whirling configuration. Their topological properties, nanometre size and the fact that they can be moved by small current densities have opened a new paradigm for the manipulation of magnetization at the nanoscale. Chiral skyrmion structures have so far been experimentally demonstrated only in bulk materials and in epitaxial ultrathin films, and under an external magnetic field or at low temperature. Here, we report on the observation of stable skyrmions in sputtered ultrathin Pt/Co/MgO nanostructures at room temperature and zero external magnetic field. We use high lateral resolution X-ray magnetic circular dichroism microscopy to image their chiral Néel internal structure, which we explain as due to the large strength of the Dzyaloshinskii-Moriya interaction as revealed by spin wave spectroscopy measurements. Our results are substantiated by micromagnetic simulations and numerical models, which allow the identification of the physical mechanisms governing the size and stability of the skyrmions.

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