Jie Shan
Cornell University
Thursday 21th January 16:00 – 16:40 CET
ZOOM LINK TO JOIN IN: http://s.ic.fo/FNS2021_Jan21
Mechanical detection and control of magnetic states in 2D layered magnetic materials
By Jie Shan
Professor, Applied and Engineering Physics
ABSTRACT:
Magnetostriction, coupling between the mechanical and magnetic degrees of freedom, finds a variety of applications in magnetic actuation, transduction and sensing. The discovery of two-dimensional (2D) layered magnetic materials presents a new platform to explore the magnetostriction effects in ultrathin solids. Here we demonstrate resonators made of 2D antiferromagnetic CrI3. The mechanical resonance frequency is found to depend on the magnetic state of the material. We quantify the relative importance of the exchange and anisotropy magnetostriction by measuring the resonance frequency under a magnetic field parallel and perpendicular to the easy axis, respectively. Furthermore, we show efficient strain-tuning of the internal magnetic interactions in CrI3 as a result of inverse magnetostriction. Our results establish the basis for mechanical detection and control of the magnetic states and magnetic phase transitions in 2D layered materials.