NICOP - Probing the magneto-elastic coupling of a one unit cell thick ferromagnet realizing a two dimensional magnetostrictive sensor and actuator
Abstract
Graphene and other 2D materials offer an exciting opportunity for electronic and optoelectronicproperties individually and as hybri"ds in combination1. The exciting properties include high mobilityat room temperature 2, ultra fast photoresponse3, high sensitivity"" to light4, transparency 5andinteraction with light4,6,7 and mechanical flexibility 6,7. In addition, the property that makes these"broad class of 2D materials exciting is the ability to tune some of these properties. Of particularinterest is the recent discovery of ferromagnetism in three atomic thick layers of materials like CrI38 and Cr2Ge2Te6 9. These experiments have opened up avenues for a large variety of experimentsin spintronics using Van der Waals heterostructures10. One additional consequence of magnetism ismagnetostriction ~ change in dimension of crystal as a function of magnetization. We will probemagnetostriction in one unit cell thick magnetic materials and make nanomechanical sensors.Magnetoelastic coupling in specially designed alloy forms the basis of technologies like sonar andvariety of actuators. Our proposal aims to realize the smallest possible magnetostrictive NEMSsensor and actuator. Nanoscale actuators like this could be of interest for nano-fluidic devices.In this proposal we propose to achieve following goals:a) Realize a nanomechanical (NEMS) device in drum geometryb) Use the one unit cell thick ferromagnetic material Cr2Si2Te6c) Study the magnetostriction coefficient of one unit cell thick materiald) Quantitatively measure the magnetostriction coefficient as a function of the temperatureand magnetic field
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 20, 2018
- Source ID
- N629091812058
Entities
People
- Mandar M Deshmukh
Organizations
- Office of Naval Research
- Tata Institute of Fundamental Research
- United States Navy