Regensburg 2025 – scientific programme
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MA: Fachverband Magnetismus
MA 4: Electron Theory of Magnetism and Correlations
MA 4.3: Talk
Monday, March 17, 2025, 10:00–10:15, H19
Domain wall engineering in distorted Kagome magnet — •Avdhesh Kumar Sharma1, Premakumar Yanda1, Samuel Harrison Moody2, Chandra Shekhar1, and Claudia Felser1 — 1Max Planck Institute for chemical physics of solids, 01187 Dresden, Germany — 2Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
In condensed matter, Kagome material can host interplay of nontrivial topology, correlations, and magnetism due to their unique lattice and band structure. Recently, RTX series with ZrNiAl structure have gained attention due to possessing kagome lattice continuously breaking translation symmetry i.e., distorted kagome lattice. Intriguingly, HoAgGe has been predicted to have a kagome spin ice state and break the the reversal like symmetry and show two degenerate states in anomalous Hall effect. Along this line, we have synthesized single crystals of TbAgGe to investigate the magnetic and electrical transport properties in detail. It crystallizes in a hexagonal crystal structure with space group P-62m. It exhibits long-range AFM ordering of Tb3+ ions at Néel temperatures 29K, 25K and 20K. Further, it shows metamagnetic transitions when H || c, which might result in a non-coplanar spin structure in the system and goes to ferromagnetic (FM) state at high fields. Moreover, it shows significant anomalous Hall effect near the metamagnetic transitions, which is attributed to originating from the magnetic domain walls. Our findings suggest that RTX family with distorted kagome lattice can be an excellent platform to study the interplay of domain wall magnetism and topology.
Keywords: Kagome material; Anomalous Hall effect; Frustrated magnetism; Domain wall; Topology