Excellence research field rewarded in 2007 by a Nobel Prize in Physics (A. Fert and P. Grunberg), the Spintronics deals with the manipulation of the electron spin in electronic devices. Moreover, in Spintronics one exploits and skillfully engineers quantum mechanics properties of low dimensional systems. They are usually constituted by complex multilayer stacks/architectures composed by magnetic, nonmagnetic and insulating thin films with atomic layer scale thicknesses range. The spin manipulation is based on the interplay between the electronic transport of the electron charge with the magnetism of the layers. The magnetic properties are skillfully tailored via the shape and the lateral size of the spintronic device within the mezoscopic regime where sizes became comparable with characteristic lengths of magnetism in constituent materials.

Our group develops Spintronics researches following a complex multiscale approach, correlating theoretical and simulation issues with experiments. In our approach we have in view some major milestones:

  • Starting from predictive theoretical calculations (ab-initio, micromagnetism) we design, elaborate and study innovative materials and spintronic devices. Namely, we base our research on model systems and architectures, in which theory and experiment may be confronted. Beyond standard classical Spintronics based on magnetorezistance effects, we currently address new areas related to enhanced energetic efficiency manipulation of magnetization by electric fields, spin currents, polarized photons, etc and Dzyaloshinskii-Moriya interaction (DMI) triggered topological magnetic structures such as magnetic skyrmions, chiral domain walls.
     
  • Computational Physics activities are dedicated to get deeper understanding of underlying fundamental Physics and main mechanisms related to spin and charge transport in low dimensional systems and spintronic devices. Theoretical and simulation researches involve ab-initio techniques and micromagnetics. Recent results address mechanisms of magnetic anisotropy related to Rashba interface fields, voltage control of magnetic anisotropy, DMI variation with electric field. These issues are particularly interesting for stochastic and neuromorphic spintronics applications. 
     
  • In collaboration with partners from Spain and France we are involved in a new "cutting-edge" research area: the Superconducting Spintronics. This is a new convergence area of two main fundamental domains in Physics: the Superconductivity and the Magnetism. In model double tunnel barrier magnetic tunnel junction systems composed by epitaxial insulators, superconducting layers and ferromagnetic thin films in which the tunnel transport is polarized both in spin and symmetry of the Bloch electronic wave-function we recently demonstrated interesting phenomena such as triplet superconductivity, magneto-anisotropic Andreev reflexion, new mechanism for perpendicular magnetic anisotropy in ultra thin ferromagnetic films in proximity to superconducting ones.