The research activities of the team aim at providing a better understanding of spin dependent transport and magnetization dynamics in ferromagnets at the nanoscale. From the theoretical point of view, state-of-the-art finite-element micromagnetic simulations are being carried out to investigate the static and dynamic properties of various nanoscale magnetic systems. From the experimental point of view, we investigate spin-polarized transport in two extreme situations: Tunneling through low-dimensional structures is probed by growing them into epitaxial tunnel junctions and measuring their low-temperature magnetoresistance. Long-range diffusive spin transport is probed by measuring the propagation of spin waves along ferromagnetic metal films and its modification by an electrical current (spin-wave Doppler shift).
M. Grassi, M. Geilen, D. Louis, M. Mohseni, T. Braecher, M. Hehn, D. Stoeffler, M. Bailleul, P. Pirro, Y. Henry, Slow-Wave-Based Nanomagnonic Diode, Physical Review Applied. 14 (2020) 024047. https://doi.org/10.1103/PhysRevApplied.14.024047.
B. Kengni-Zanguim, L. Joly, F. Scheurer, P. Ohresser, J.-F. Dayen, C. Ulhaq-Bouillet, J. Uzan, B. Kundys, H. Majjad, D. Halley, Magnetic phase and magneto-resistive effects in vanadium oxide epitaxial nanoclusters, Applied Physics Letters. 116 (2020) 042404. https://doi.org/10.1063/1.5131829.
A.N. Morozovska, E.A. Eliseev, R. Hertel, Y.M. Fomichov, V. Tulaidan, V.Y. Reshetnyak, D.R. Evans, Electric field control of three-dimensional vortex states in core-shell ferroelectric nanoparticles, Acta Materialia. 200 (2020) 256–273. https://doi.org/https://doi.org/10.1016/j.actamat.2020.09.003.
M. Sushruth, M. Grassi, K. Ait-Oukaci, D. Stoeffler, Y. Henry, D. Lacour, M. Hehn, U. Bhaskar, M. Bailleul, T. Devolder, J.-P. Adam, Electrical spectroscopy of forward volume spin waves in perpendicularly magnetized materials, Physical Review Research. 2 (2020) 043203. https://doi.org/10.1103/PhysRevResearch.2.043203.