2025-03-12 オランダ・デルフト工科大学（TUDelft）
＜関連情報＞
- https://www.tudelft.nl/en/2025/me/news/decoding-material-phase-transitions-with-nanodrums
- https://www.nature.com/articles/s41467-025-57317-4
相転移に近いナノドラムの非線形ダイナミクスと磁気弾性 Nonlinear dynamics and magneto-elasticity of nanodrums near the phase transition
Makars Šiškins,Ata Keşkekler,Maurits J. A. Houmes,Samuel Mañas-Valero,Maciej Koperski,Eugenio Coronado,Yaroslav M. Blanter,Herre S. J. van der Zant,Peter G. Steeneken & Farbod Alijani
Nature Communications Published:12 March 2025
DOI:https://doi.org/10.1038/s41467-025-57317-4
Abstract
Nanomechanical resonances of two-dimensional (2D) materials are sensitive probes for condensedmatter physics, offering new insights into magnetic and electronic phase transitions. Despite extensive research, the influence of the spin dynamics near a phase transition on the nonlinear dynamics of 2D membranes has remained largely unexplored. Here, we investigate nonlinear magneto-mechanical coupling to antiferromagnetic order in suspended FePS3-based heterostructure membranes. By monitoring the motion of these membranes as a function of temperature, we observe characteristic features in both nonlinear stiffness and damping close to the Néel temperature TN. We account for these experimental observations with an analytical magnetostriction model in which these nonlinearities emerge from a coupling between mechanical and magnetic oscillations, demonstrating that magneto-elasticity can lead to nonlinear damping. Our findings thus provide insights into the thermodynamics and magneto-mechanical energy dissipation mechanisms in nanomechanical resonators due to the material’s phase change and magnetic order relaxation.
