New low temperature phases in chiral cubic magnets

ORAL

Abstract

Chiral and skyrmion-hosting cubic magnets have so far been described in terms of a universal magnetic phase diagram composed of helical spiral, conical spiral, and skyrmion crystal phases. A remarkable deviation from this universal behavior occurs in Cu2OSeO3 revealed by neutron scattering and magnetization measurements. Below the upper critical field at which the conical spiral state disappears, the spiral wave vector rotates away from the magnetic field direction. We discuss the physical origin of this new state and suggest that it provides the in-homogeneous magnetic environment required to stabilise new low temperature skyrmionic phases. We discuss the different stabilization and nucleation mechanisms and the thermodynamic stability of these low temperature skyrmionics phases, as they have been investigated by neutron scattering.

*The work is financially supported by The Netherlands Organization for Scientific Research through project 721.012.102 (LARMOR), the Vrije FOM-programma ‘Skyrmionics’ (Netherlands) as well as the JSPS Core-to-Core Program, Advanced Research Networks (Japan) and JSPS Grant-in-Aid for Research Activity Start-up 17H06889 (Japan).

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Presenters

  • Catherine Pappas

    • Applied Sciences, Delft University of Technology

Authors

  • Catherine Pappas

    • Applied Sciences, Delft University of Technology

  • Fengjiao Qian

    • Applied Sciences, Delft University of Technology

  • Lars J. Bannenberg

    • Applied Sciences, Delft University of Technology

  • Ankit Labh

    • Applied Sciences, Delft University of Technology

  • Heribert Wilhelm

    • Helmholtz Institute Ulm

  • Robert Cubitt

    • Institut Laue Langevin
    • Institut Laue-Langevin, Grenoble, France

  • Eddy Lelièvre-Berna

    • Institut Laue-Langevin, Grenoble, France

  • Gregory Chaboussant

    • Laboratoire Léon Brillouin, CEA-Saclay, Gif sur Yvette, France

  • Lisa DeBeer-Schmitt

    • Oak Ridge National Laboratory
    • Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
    • Neutron Scattering Science Division, Oak Ridge National Laboratory
    • Oak Ridge National Lab
    • Oak Ridge National Laboratory, Oak Ridge, USA

  • Marcus P. Schmidt

    • Max Planck Institute for Chemical Physics of Solids
    • Max Planck Institute for Chemical Physics of Solids, Dresden, Germany

  • Maxim Mostovoy

    • Zernike Institute for Advanced Materials, University of Groningen, Netherlands

  • Andrey Leonov

    • Chiral Research Center, Hiroshima University, Japan