Development of stretchable and imperceptible magnonic systems – SYSMAG

This project is situated in the broad context of stretchable electronics, and more specifically in that of magnetic systems deposited on compliant substrates, which are of growing interest. Indeed, increasingly complex forms of electronic devices and intelligent textiles must incorporate magnetic functionality for data storage/transfer. From a general point of view, the main limitation of these deformable systems is their often too low durability. While substrates generally made of polymers are suitable for large deformations, inorganic nanostructures that carry the magnetic functionality are inherently much brittle. Thus, a major challenge is to understand the mechanical phenomena at large deformations as well as the links between these mechanical phenomena and magnetic behaviour (due to magnetoelastic coupling). In addition, beyond the continuous thin film based systems, we plan in this project to develop magnonic crystals (periodic array of magnetic nanostructures) on elastomeric substrates, whose targeted applications are multi-frequency magnetic stretchable/flexible systems. This work thus aims to study the effects of lateral nanostructuring of thin films on the coupled mechanical and magnetic properties that can be jointly optimized. In particular, we aim to develop magnonic crystals whose spin wave spectrum remains stable at high deformation. This project is part of a partnership between LSPM-CNRS (Université Sorbonne Paris Nord) and ITODYS (CNRS-Université de Paris), which combines its skills in nanophysics and nanochemistry respectively to develop magnonic systems combining lightness, transparency and mechanical strength at high deformation.