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Macroscopic manifestation of domain-wall magnetism and magnetoelectric effect in a Néel-type skyrmion host

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Geirhos Korbinian, Gross Boris, Szigeti Bertalan G., Mehlin Andrea, Philipp Simon, White Jonathan S., Cubitt Robert, Widmann Sebastian, Ghara Somnath, Lunkenheimer Peter, Tsurkan Vladimir, Neuber Erik, Ivaneyko Dmytro, Milde Peter, Eng Lukas M., Leonov Andrey O., Bordács Sándor, Poggio Martino, Kézsmárki István,
Project Discovery and Nanoengineering of Novel Skyrmion-hosting Materials
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Original article (peer-reviewed)

Journal npj Quantum Materials
Volume (Issue) 5(1)
Page(s) 44 - 44
Title of proceedings npj Quantum Materials
DOI 10.1038/s41535-020-0247-z

Open Access

URL http://doi.org/10.1038/s41535-020-0247-z
Type of Open Access Publisher (Gold Open Access)

Abstract

We report a magnetic state in GaV4Se8 which emerges exclusively in samples with mesoscale polar domains and not in polar mono-domain crystals. It is manifested by a sharp anomaly in the magnetic susceptibility and the magnetic torque, distinct from other anomalies observed also in polar mono-domain samples upon transitions between the cycloidal, the Néel-type skyrmion lattice and the ferromagnetic states. We ascribe this additional transition to the transformation of distinct magnetic textures, confined to polar domain walls (DW), to the ferromagnetic (FM) state. The emergence of these DW-confined magnetic states is likely driven by the mismatch of different spin spirals, hosted by the adjacent domains. A clear anomaly in the magneto-current indicates that the DW-confined magnetic states also have strong contributions to the magnetoelectric response. We expect polar DWs to commonly host such confined magnetic edge states and, thus, offer a fertile ground to explore novel forms of magnetism.
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