Nanomechanical probing and strain tuning of the Curie temperature in suspended Cr2Ge2Te6-based heterostructures
Makars Šiškins (Kavli institute of nanoscience Delft, TU Delft - QN/Steeneken Lab)
Samer Kurdi (TU Delft - QN/vanderSarlab, Kavli institute of nanoscience Delft)
Martin Lee (TU Delft - QN/Steeneken Lab, Kavli institute of nanoscience Delft)
Benjamin J.M. Slotboom (Student TU Delft)
Wenyu Xing (Peking University)
Samuel Mañas-Valero (Universidad de Valencia (ICMol))
Eugenio Coronado (Universidad de Valencia (ICMol))
Shuang Jia (Peking University)
Wei Han (Peking University)
Toeno van der Sar (TU Delft - QN/vanderSarlab, Kavli institute of nanoscience Delft)
Herre S.J. van der Zant (Kavli institute of nanoscience Delft, TU Delft - QN/van der Zant Lab)
Peter G. Steeneken (Kavli institute of nanoscience Delft, TU Delft - QN/Steeneken Lab, TU Delft - Dynamics of Micro and Nano Systems)
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
Abstract
Two-dimensional magnetic materials with strong magnetostriction are attractive systems for realizing strain-tuning of the magnetization in spintronic and nanomagnetic devices. This requires an understanding of the magneto-mechanical coupling in these materials. In this work, we suspend thin Cr2Ge2Te6 layers and their heterostructures, creating ferromagnetic nanomechanical membrane resonators. We probe their mechanical and magnetic properties as a function of temperature and strain by observing magneto-elastic signatures in the temperature-dependent resonance frequency near the Curie temperature, TC. We compensate for the negative thermal expansion coefficient of Cr2Ge2Te6 by fabricating heterostructures with thin layers of WSe2 and antiferromagnetic FePS3, which have positive thermal expansion coefficients. Thus we demonstrate the possibility of probing multiple magnetic phase transitions in a single heterostructure. Finally, we demonstrate a strain-induced enhancement of TC in a suspended Cr2Ge2Te6-based heterostructure by 2.5 ± 0.6 K by applying a strain of 0.026% via electrostatic force.
help_outline