Regensburg 2025 – scientific programme
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MA: Fachverband Magnetismus
MA 21: Frustrated Magnets I
MA 21.2: Talk
Wednesday, March 19, 2025, 09:45–10:00, H18
Dilatometry studies on the spin supersolid candidate materials K2Co(SeO3)2 and Rb2Co(SeO3)2 — •Erik Walendy1, Kwangwoo Shin2, Jae-Ho Chung2, Kwang-Yong Choi2, and Rüdiger Klingeler1 — 1Kirchhoff Institute for Physics, Heidelberg University, Germany — 2Department of Physics, Korea University, Seoul 02841, Korea
The layered triangular lattice material K2Co(SeO3)2 has recently attracted attention due to the presence of a high-field spin supersolid phase between 18 and 21 T, at 2 K [1]. We report high-resolution capacitance dilatometric studies on single crystals of K2Co(SeO3)2 and Rb2Co(SeO3)2. Pronounced anomalies in thermal expansion and magnetostriction measurements at the phase boundaries imply significant magnetoelastic coupling. We obtain the uniaxial strain dependencies of the field-induced phases and construct the magneto-elastic phase diagrams.
[1] T. Chen et al. arXiv:2402.15869 (2024).
Keywords: dilatometry; frustration; spin supersolid