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TT: Fachverband Tiefe Temperaturen
TT 29: Frustrated Magnets: General
TT 29.1: Talk
Wednesday, March 29, 2023, 09:30–09:45, HSZ 201
Possible stress-driven spiral-to-Néel transition in the triangular antiferromagnet PdCrO2 — •Nina Stilkerich1,2, Seunghyun Khim2, Andrew Mackenzie2,3, Jochen Geck1, and Clifford Hicks2,4 — 1Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 Dresden, Germany — 2Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, 01187 Dresden, Germany — 3Scottish Universities Physics Alliance (SUPA), School of Physics and Astronomy, University of St. Andrews, St. Andrews KY16 9SS, United Kingdom — 4School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, United Kingdom
PdCrO2 is a triangular antiferromagnet that undergoes a transition from a double-q to single-q magnetic structure under moderate uniaxial stress [1]. Due to a high sensitivity of the magnetic anisotropy to uniaxial stress, another transition from spiral order to a linear antiferromagnetic structure is predicted for higher stress of about 1 GPa [1].
We performed stress-strain measurements on PdCrO2 and were able to identify the double- to single-q transition as a jump in strain. We report the discovery of an additional transition under higher stress, which might be the spin spiral to Néel transition suggested previously.
[1] D. Sun et al., New J. Phys. 23, 123050 (2021)