- 18.06.2019 -
S3 seminar: Giulia Avvisati (UniRoma1)
Tuesday June 18, 2019 - 15:00
S3 Seminar Room, Third Floor, Physics Building, FIM Department
Speaker: Giulia Avvisati
Dipartimento di Fisica, Università La Sapienza - Roma
Title: Tuning the (anti)ferromagnetic coupling of MPcs/Gr/FM spin interfaces
Host: Andrea Ferretti andrea.ferretti@nano.cnr.it
Abstract: Paramagnetic metal organic molecules can open the route to engineer spintronic devices when their magnetic moments are stabilized against thermal fluctuations, e.g. by a controlled interaction with a magnetic substrate. We report on robust spin interfaces, exhibiting residual magnetic coupling up to room temperature (RT), with tunable (anti- or ferromagnetic) alignment. This is enabled by an optimized configuration of the magnetic support, a Gr substrate intercalated with ferromagnetic metals/alloys (Fe,Co,FeCo), and molecular units with suitable symmetry of the molecular orbitals carrying the magnetic moment. The (anti)ferromagnetic response of the spin interface is determined by a symmetry-selected superexchange path, actively mediated by the Gr sheet and the organic backbone of the MPc molecules (Ref.[1]).
Combined optimization both of the magnetic state of the substrate and of the super-exchange channel open an incredible playground for the nanomagnetism scientific community.
References
[1] Avvisati G., Cardoso C., Varsano D., Ferretti A., Gargiani P., Betti M.G. Nano Letters 18, 2268-2273 (2018)
Info andrea.ferretti@nano.cnr.it
Link http://www.nano.cnr.it/?mod=men&id=116