2020/01/22 by Korbinian Geirhos, K. Geirhos, Boris Gross +31 · 1 citation
Materials Science · Physics and Astronomy · #2D Materials and Applications #Ferromagnetism #Ground state #Magnetic anomaly #Magnetic domain #Magnetism #Magnetoelectric effect #Multiferroics and related materials #Polar #Skyrmion #Topological Materials and Phenomena #cond-mat.str-el
paper · pdf · doi:10.1038/s41535-020-0247-z
published as npj Quantum Mater. 5, 44 (2020)
arxiv created 2020/01/22 · openalex publication_date 2020/07/06 · openalex created_date 2020/07/10 · arxiv updated 2020/09/07 · openalex updated_date 2026/08/06
Abstract 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 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.