Simultaneous Multi-Domain Transformation of Vanadium Dioxide for Reconfigurable Metamaterial Architectures
Applied Physics A（2022）
U.S. Army Research Laboratory | U.S. Army C5ISR Center
Abstract
Vanadium dioxide (VO2), a thermochromic material, undergoes an insulator-to-metal transition resulting from a thermally induced crystallographic transformation. The monoclinic insulator phase transitions to a rutile metallic phase resulting in a fast reversible transition of an array of its material properties. Here, we present the temperature-induced multi-physical transformation of a VO2 thin film grown via physical vapor deposition. Growth of the phase-changing oxide, structural characterization of the thin film, electrical transition, and the in situ thermo-mechanical response of the deposited film will be discussed. Further, we present simulation results from the investigation of these material properties in the context of actuation of VO2-bimorphs for a vertical switch and discuss how the application of this material may be extended to aerospace applications.
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