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Magnetic Skyrmions and Skyrmion Clusters in the Helical Phase of Cu2OSeO3

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Mueller Jan, Rajeswari Jayaraman, Huang Ping, Murooka Yoshie, Ronnow Henrik M., Carbone Fabrizio, Rosch Achim,
Project Quantum Magnetism - Checkerboards, Skyrmions and Dipoles
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Original article (peer-reviewed)

Journal PHYSICAL REVIEW LETTERS
Volume (Issue) 119(13)
Page(s) 137201
Title of proceedings PHYSICAL REVIEW LETTERS
DOI 10.1103/physrevlett.119.137201

Open Access

URL https://infoscience.epfl.ch/record/255046?ln=fr
Type of Open Access Repository (Green Open Access)

Abstract

Skyrmions are nanometric spin whirls that can be stabilized in magnets lacking inversion symmetry. The properties of isolated Skyrmions embedded in a ferromagnetic background have been intensively studied. We show that single Skyrmions and clusters of Skyrmions can also form in the helical phase and investigate theoretically their energetics and dynamics. The helical background provides natural one-dimensional channels along which a Skyrmion can move rapidly. In contrast to Skyrmions in ferromagnets, the Skyrmion-Skyrmion interaction has a strong attractive component and thus Skyrmions tend to form clusters with characteristic shapes. These clusters are directly observed in transmission electron microscopy measurements in thin films of Cu2OSeO3. Topological quantization, high mobility, and the confinement of Skyrmions in channels provided by the helical background may be useful for future spintronics devices.
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