Macroscopic manifestation of domain-wall magnetism and magnetoelectric effect in a Néel-type skyrmion host
| Autor: | B. Gross, Vladimir Tsurkan, Simon Philipp, István Kézsmárki, Sándor Bordács, Somnath Ghara, Andrey O. Leonov, Martino Poggio, B. Szigeti, Robert Cubitt, Dmytro Ivaneyko, Peter Milde, A. Mehlin, Lukas M. Eng, Erik Neuber, S. Widmann, Jonathan S. White, Peter Lunkenheimer, K. Geirhos |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Condensed matter physics Magnetic moment Magnetism Skyrmion Magnetoelectric effect 02 engineering and technology lcsh:Atomic physics. Constitution and properties of matter 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Magnetic susceptibility lcsh:QC170-197 Electronic Optical and Magnetic Materials Condensed Matter - Strongly Correlated Electrons Ferromagnetism Lattice (order) 0103 physical sciences lcsh:TA401-492 Polar lcsh:Materials of engineering and construction. Mechanics of materials ddc:530 010306 general physics 0210 nano-technology |
| Zdroj: | 'npj Quantum Materials ', vol: 5, pages: 44-1-44-8 (2020) npj Quantum Materials, Vol 5, Iss 1, Pp 1-8 (2020) |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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