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TT: Fachverband Tiefe Temperaturen
TT 23: Correlated Electrons – Poster I
TT 23.13: Poster
Montag, 9. März 2026, 18:00–20:00, P1
Hall Response, Angular Magnetoresistance, and Field-Induced Metamagnetism in Sr4Ru3O10 — •Ilke Masa1, Simone Seipel1, Lara Pätzold1, Zahra Ghazinezhad1, Agustinus Agung Nugroho2, Markus Braden1, and Thomas Lorenz1 — 1Institute of Physics II; University of Cologne, Germany — 2Bandung Institute of Technology, Indonesia
Sr4Ru3O10 is a ferromagnetic metal with TC ≈ 105 K and exhibits an additional metamagnetic transition below 50 K, whose microscopic origin remains unclear. We investigate single crystals to characterize the anisotropy of magnetization and electrical transport. For in-plane currents, we measure both the normal and anomalous Hall effects, finding a non-monotonic temperature dependence and a low-temperature sign reversal of the anomalous Hall signal, similar to behavior known from SrRuO3 and associated with Weyl points in its band structure. Due to the layered crystal structure, the out-of-plane resistivity is highly anisotropic (ρc ≫ ρab) and shows pronounced changes across the metamagnetic transition. From magnetoresistance data, we extract the field-induced metamagnetic transition at low temperatures and analyse the angular dependence of both the transition fields and the in-plane magnetoresistance. We also identify a clear angular magnetoresistance response in Sr4Ru3O10. Possible low-temperature phases remain subjects of ongoing research.
Funded by the DFG via CRC 1238 projects A02, B01 and B04.
Keywords: Weyl fermions; Angular magnetoresistance; Hall effect; Low-temperature phases; Metamagnetic transition