Scientific publication by ULTIMATE-I researchers from CNEA-CONICET Argentina and University of Zaragoza Spain: « Annealing effects on the magnetic and magnetotransport properties of iron oxide nanoparticles self-assemblies »

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

DOI: 10.1088/1361-6528/aced0e

Poster presentations at JEMS 2023, Madrid (Spain)

JEMS 2023, 27th Aug. to 1st Sep. 2023, Madrid (Spain)

Luis Avilés (CNEA): « Spin transport and magnetic dynamics in ultra low damping epitaxial Co100-xFex/Ta bilayers »; authors: D. Velázquez Rodríguez, J.E. Gómez, T.E. Torres, M.H. Aguirre J. Milano, P. Costanzo, L. Avilés-Félix, A. Butera

Lara Solís (CNEA): « Temperature-dependence of ferromagnetic resonance in YIG garnets thin films »; authors: Lara M. Solís, Santiago Carreira, Javier Briático, Abdelmadjid Anane, Myriam H. Aguirre, Laura Steren

Myriam Aguirre (UNIZAR): « Synthesis of magnetite from natural pyrite for energy conversion devices »; authors: Vanina G. Franco, Adriana E. Candia, Jorge M. Núñez, Miguel Rengifo, Myriam H. Aguirre