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New magnetic phase of the chiral skyrmion material Cu 2 OSeO 3

DOI: 10.1126/sciadv.aat7323 DOI Help

Authors: Fengjiao Qian (Delft University of Technology) , Lars J. Bannenberg (Delft University of Technology) , Heribert Wilhelm (Diamond Light Source) , Grégory Chaboussant (Laboratoire Léon Brillouin, CEA-Saclay) , Lisa M. Debeer-Schmitt (Oak Ridge National Laboratory) , Marcus P. Schmidt (Max Planck Institute for Chemical Physics of Solids) , Aisha Aqeel (Zernike Institute for Advanced Materials, University of Groningen) , Thomas T. M. Palstra (Zernike Institute for Advanced Materials, University of Groningen) , Ekkes Brück (Delft University of Technology) , Anton J. E. Lefering (Delft University of Technology) , Catherine Pappas (Delft University of Technology) , Maxim Mostovoy (Zernike Institute for Advanced Materials, University of Groningen) , Andrey O. Leonov (Hiroshima University)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Science Advances , VOL 4

State: Published (Approved)
Published: September 2018

Open Access Open Access

Abstract: The lack of inversion symmetry in the crystal lattice of magnetic materials gives rise to complex noncollinear spin orders through interactions of a relativistic nature, resulting in interesting physical phenomena, such as emergent electromagnetism. Studies of cubic chiral magnets revealed a universal magnetic phase diagram composed of helical spiral, conical spiral, and skyrmion crystal phases. We report a remarkable deviation from this universal behavior. By combining neutron diffraction with magnetization measurements, we observe a new multidomain state in Cu2OSeO3. Just below the upper critical field at which the conical spiral state disappears, the spiral wave vector rotates away from the magnetic field direction. This transition gives rise to large magnetic fluctuations. We clarify the physical origin of the new state and discuss its multiferroic properties.

Subject Areas: Materials, Physics

Technical Areas: Theoretical Physics

Added On: 10/10/2018 10:54


Discipline Tags:

Materials Science Physics Magnetism

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