Regensburg 2022 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 35: Poster 2

MA 35.72: Poster

Donnerstag, 8. September 2022, 16:00–18:00, P4

Suppression of Weak Ferromagnetic Order in SrRuO₃ under Pressure — •Anh Tong¹, Pau Jorba¹, Marc Seifert¹, Stefan Kunkemöller², Kevin Jenni², Markus Braden², James S. Schilling¹, and Christian Pfleiderer¹ — ¹Technical University of Munich, Garching bei München, Germany — ²University of Cologne, Cologne, Germany

In the Ruddlesden-Popper perovskite series, Sr_n+1 Ru_n O_{3 n+1}, intense experimental and theoretical efforts have been dedicated to unravel the nature of unconventional superconductivity in single-layer Sr₂ RuO₄(n=1) as well as a putative electronic nematic phase masking the quantum critical endpoint in the double-layer itinerant metamagnet Sr₃ Ru₂ O₇ (n=2). We report an experimental study of the zero temperature ferromagnetic-to-paramagnetic transition under pressures up to 20 GPa in high quality single crystals of the infinite layer itinerant ferromagnet SrRuO₃(n=∞). Electrical transport measurements in Bridgman anvil high pressure cells, as well as neutron depolarization measurements in diamond anvil cells were performed on SrRuO₃. Our study aims to investigate quantum criticality in SrRuO₃ and reconcile the properties of Sr₃ Ru₂ O₇ and Sr₂ RuO₄ with the generic temperature-pressure-magnetic field phase diagram of itinerant ferromagnets.

[1] M. Brando et al., Rev. Mod. Phys. 88, 2 (2016).

[2] J. J. Hamlin et al., Phys. Rev. B 76, 1 (2007).

[3] G. Cao et al., Phys. Rev. B 56, 1 (1997).