Regensburg 2022 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 23: Frustrated Magnets - General
TT 23.6: Vortrag
Mittwoch, 7. September 2022, 16:15–16:30, H22
Nonlinear stress-strain relation of PdCrO2 — •Nina Stilkerich1,2, Hilary Noad1, Seunghyun Khim1, Andrew Mackenzie1,3, and Clifford Hicks1,4 — 1Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, 01187 Dresden, Germany — 2Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 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 delafossite with an antiferromagnetic triangular lattice and a Neel temperature of 38 K. It has a double-q magnetic structure, in which the direction of spin rotation alternates from layer to layer. Under uniaxial stress, PdCrO2 undergoes a transition from this double- to a single-q structure. Here, we will show stress-strain data on PdCrO2, collected using a piezoelectric-driven strain cell that allows simultaneous measurement of uniaxial stress and strain. We will show that the change in lattice constant across this magnetic transition is quite large and that the transition evolves in a nontrivial way as temperature is raised.