Description du projet
Un photomagnétisme accessible et pratique fonctionnant en lumière visible et à température ambiante
Le magnétisme occupe une place centrale dans les applications de mémoire magnétique actuelles, notamment l’enregistrement magnétique à haute densité et la mémoire vive magnétique. Le ferromagnétisme, une propriété permettant de maintenir des états d’aimantation pendant de longues périodes, et la commutation ferromagnétique en sont les éléments facilitateurs. La commutation ferromagnétique peut être réalisée de différentes manières. Financé par le Conseil européen de la recherche, le projet LUX-INVENTA exploitera des matériaux photomagnétiques, ou photo-aimants, pour déclencher une commutation ferromagnétique dont l’objectif ultime est d’utiliser des photons solaires renouvelables. Les photo-aimants actuels restent enfermés dans le carcan du laboratoire car ils exigent des températures de fonctionnement très basses. LUX-INVENTA aplanira cet obstacle en concevant de nouveaux photo-aimants moléculaires à température ambiante grâce à une meilleure compréhension des processus à l’œuvre pendant l’absorption des photons par les chromophores photomagnétiques.
Objectif
Visible light provided by the Sun is the cleanest energy source one could ever imagine. Harvesting it is crucial for further development of science and technology as well as for reducing the ecological footprint of humanity. The efficient use of the visible spectrum of the Sun can take many forms and the direct photoexcitation of molecules resulting in a dramatic magnetization change - the so called photomagnetic effect - is one of them. In other words, sunlight photons could write, read and erase magnetic states of photomagnets. Photomagnets can be designed and prepared via a bottom-up modular approach using low-energy preparation methods developed by coordination, organometallic chemistry, supramolecular chemistry and crystal engineering with the support from physical and computational sciences. Photomagnets belong to the class of smart multifunctional molecular materials that become paramagnetic, ferromagnetic or simply change their magnetic properties upon illumination - a feature that is hardly accessible in conventional magnetic solids - metal alloys and oxides. Currently known photomagnets are merely laboratory curiosities due to extremely low operation temperatures below the boiling point of nitrogen (-196?C). Hence, the overarching goal of LUX-INVENTA is the discovery of room temperature (RT) photomagnets that would show light-induced ON/OFF ferromagnetic switching under normal conditions. This goal will be pursued alongside the deep understanding of the processes occurring during the absorption of a photon by photomagnetic chromophores - the molecular components responsible for the photomagnetic effect. The proposed research focuses on (i) the design and synthesis of novel photomagnetic chromophores, (ii) investigation of the mechanism of the photomagnetic switching and (iii) preparation of RT photomagnets by a rational incorporation of the photomagnetic chromophores in the structure of coordination polymers and metal-organic frameworks
Champ scientifique
- engineering and technologymaterials engineeringcrystals
- natural scienceschemical sciencesinorganic chemistryorganometallic chemistry
- natural scienceschemical sciencespolymer sciences
- natural sciencescomputer and information sciencescomputational science
- natural sciencesphysical sciencestheoretical physicsparticle physicsphotons
Mots‑clés
Programme(s)
- HORIZON.1.1 - European Research Council (ERC) Main Programme
Régime de financement
HORIZON-ERC - HORIZON ERC GrantsInstitution d’accueil
31-007 Krakow
Pologne