Fernando Fabris, Enio Lima Jr. (CNEA-CONICET), Jorge Martín Núñez (CNEA), Horacio E Troiani, Myriam H Aguirre (UniZar), Víctor Leborán, Francisco Rivadulla, Elin L. Winkler (CNEA-CONICET)
In magnetic tunnel junctions based on iron oxide nanoparticles, the disorder and the oxidation state of the surface spin as well as the nanoparticles functionalization play a crucial role in the magnetotransport properties. We report a systematic study of the effects of vacuum annealing on the structural, magnetic, and transport properties of self-assembled ∼10 nm Fe3O4 nanoparticles. This work shows new insights into the influence of the nanoparticle interfacial composition, as well as their spatial arrangement, on the tunnel transport of self-assemblies, and evidence of the importance of optimizing the nanostructure fabrication for increasing the tunneling current without degrading the spin-polarized current.
Nanotechnology, Volume 34, Number 45