Campus Saint Jérome, 13013 Marseille
Aile 1, Niveau 6
The Magnetism group (MAG) is devoted to the study of exotic magnetic properties in condensed matter. We are specialized in electron spin resonance (ESR) in paramagnetic, ferromagnetic and antiferromagnetic materials.
We study materials for purely fundamental science like low-dimensional strongly correlated magnets (like spin chains, frustration, spin liquids) as well as material for potential applications in spintronics (ferromagnetic, multiferroic) and in quantum information processing (quantum coherence of electron spin in solid).
Our approach is based on three pillars: Experiment, Instrument, Theroy
Study of the formation, propagation and interaction of magnetic textures in nanostructures (nanowires, nanostrips, nanoplots):
Formation and propagation of magnetic excitations (magnons) in confined nanostructures Interactions between magnetic structures (magnons, domain walls, skyrmions) Systematic controlled displacement of magnetic textures for emergent magnetic technologies Complex non-linear domain wall dynamics under harmonic excitation: magnetic Duffing oscillator - neuromorphic computing.
Study of magnetic properties (magnetocrystalline anisotropy, magnetic relaxation, g-factor) and engeneering of ferromagnetic thin films (Mn5Ge3Cx, MnCoGe, Heussler alloys) by ferromagnetic resonance.
Generation and manipulation of optically-excited magnetic quantum states in semiconducting nanostructures. In particular, non-magnetic nanoparticles of ZnO have been recently proved by us to transit toward a localized quasi-stable magnetic excited state, when illuminated by a minimal wavelength of about 405 nm. After illumination removal, these surface magnetic states are non-radiatively relaxed by phonon scattering above 80 K and are permanent under this about 50 K. Pulse EPR has been successfully applied to this system, thus opening the way to the manipulation and monitoring of magnetic quantum states in stable and robust inorganic nanoparticles.
|Spectromètre RPE, Bruker EMX
Magnétomètre à SQUID,
Système de mesures de susceptibilité AC et DC MAGLAB 2000
Local : CINaM, ISM2, ICR, BIP, Madirel
National : LASIRE (Lille), IRCP (Paris), ISCR (Rennes), IRSN (Fontenay aux Roses), CEA (Sacclay), GREMAN (Tour).
International : NHMFL (USA), FSU (USA), U. Tokyo (Japan), U. Groningen (Germany), U. Stuttgart (Germany), Physikalishese Institut Dresden (Germany), Academy of Sciences Poznan (Poland), Jaypee University (India), LIU (Sweden).