Regensburg 2025 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 37: Correlated Electrons: Poster
TT 37.30: Poster
Wednesday, March 19, 2025, 15:00–18:00, P4
Anisotropic Magnetoresistance and Hall Effect of Sr4Ru3O10 — •Simone Seipel1, Lara Pätzold1, Zahra Ghazinezhad1, Augustus A. Nugroho2, Markus Braden1, and Thomas Lorenz1 — 1II. Physikalisches Institut, Universität zu Köln, Germany — 2Bandung Institute of Technology, Indonesia
The layered transition-metal oxide Sr4Ru3O10 is a member of the Ruddlesden-Popper series with a layered orthorhombic crystal structure. It is a ferromagnetic metal with T≃ 105 K and shows an additional metamagnetic transition below 50 K, of which a deeper understanding is still missing. Here, we present a single-crystal study of the anisotropic magnetization and electrical transport properties. For in-plane electric currents (j || ab) and B || c, we present normal and anomalous Hall effect data. The latter shows a non-monotonic temperature dependence and a characteristic sign change at low temperature which similarly occurs in the magnetoresistance ρxx(B || c). Such a behavior is known from the sister compound SrRuO3 and associated with Weyl points in the band structure [1]. In addition, we studied the out-of-plane resistivity that is highly anisotropic (ρc >> ρab) due to the layered crystal structure and strongly changes at the metamagnetic transition. Based on magnetoresistance data ρc(B || ab) we derive the magnetic-field induced metamagnetic transition at low temperatures and discuss the angular dependence of the transition fields and the magnetoresistance for in-plane magnetic fields.
Funded by the DFG via CRC 1238 Projects A02, B01 and B04
[1] K. Takiguchi et al., Nat. Commun. 11, 4969 (2020).
Keywords: Ruddlesden-Popper Ruthenates; magnetoresistance; metamagnetism; Weyl fermions