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

Geirhos, Korbinian and Gross, Boris and Szigeti, Bertalan G. and Mehlin, Andrea and Philipp, Simon and White, Jonathan S. and Cubitt, Robert and Widmann, Sebastian and Ghara, Somnath and Lunkenheimer, Peter and Tsurkan, Vladimir and Neuber, Erik and Ivaneyko, Dmytro and Milde, Peter and Eng, Lukas M. and Leonov, Andrey O. and Bordacs, Sandor and Poggio, Martino and Kezsmarki, Istvan. (2020) Macroscopic manifestation of domain-wall magnetism and magnetoelectric effect in a Neel-type skyrmion host. npj Quantum Materials , 5 (1). p. 44.

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We report a magnetic state in GaV(4)Se(8)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 Neel-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.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Nanotechnologie Argovia (Poggio)
UniBasel Contributors:Gross, Boris André and Mehlin, Andrea and Philipp, Simon and Poggio, Martino
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Springer Nature
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:12 Aug 2020 14:44
Deposited On:12 Aug 2020 14:44

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