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TT: Fachverband Tiefe Temperaturen
TT 65: Frustrated Magnets: General I
TT 65.2: Talk
Thursday, March 21, 2024, 09:45–10:00, H 2053
Strain-tuned change of the Young’s modulus of the triangular antiferromagnet PdCrO2 — •Nina Stilkerich1,2, Tobias Ritschel1, Seunghyun Khim2, Andrew P. Mackenzie2,3, Jochen Geck1, and Clifford W. 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
The delafossite PdCrO2 is a frustrated antiferromagnet below its Neel temperature of 37.5K. Its triangular lattice can be compressed towards a square-like configuration with stress applied along the [-1 1 0] direction. Under high compression, a transition to Néel-type order is expected [1,2,3]. Here, we present a candidate for this transition discovered by stress-strain measurements. Related lattice changes were investigated in an in-house XRD+strain measurement. Combining both techniques, we report a substantial change in the Young’s modulus across both the double-to-single-q and possible spiral-to-Neel transition, showing that magnetic interactions have a strong influence on the elastic moduli.
[1] D. Sun et al., New J. Phys. 23 (2021) 123050
[2] A.Yoshimori, J. Phys. Soc. Japan 14 (1959) 807
[3] J.Villain, J. Phys. Chem. Solids 11 (1959) 202