Ph.D. defense of Ms. Héloïse Damas

ULTIMATE-I is pleased to invite you to PhD defence entitled: Spin current generation and self-induced spin-orbit torque in quasi-isolated GdFeCo ferrimagnet

Héloïse Damas is PhD student within the Spintronics and Nanomagnetism team at Institut Jean Lamour in Nancy, France. She studies self-induced Spin-Orbit Torque in GdFeCo ferrimagnet and her expertise is in electrical measurements (low and high-frequency measurements, magnetotransport), fabrication of devices, and transport.

The defence is on Thursday, November 9th, 2023 at 1:30 pm sharp online and in amphitheatre A200 (Mines Nancy – Campus Artem – Nancy). The introduction of the presentation will be held in French and the rest of the presentation in English.

Photo ULTIMATE-I secondment to Magnetic Resonance Laboratory, Physics Department of the Centro Atómico Bariloche of the Comisión Nacional de Energía Atómica, located in Bariloche, Rio Negro, Argentina.

Participation in the XII Latin American Workshop on Magnetism, Magnetic Materials & their Aplications (LAW3M)

XII Latin American Workshop on Magnetism, Magnetic Materials & their Aplications (LAW3M), Puerto Varas (Chile), 16th to 20th Oct. 2023

Luis Avilés (CNEA); oral presentation: “Self-induced inverse spin Hall effect in disordered FePt thin films”; authors: J.L Ampuero, J.E. Gómez, A. Butera, L. Avilés-Félix
Alejandro Butera (CONICET); oral presentation: “Spin currents in Co/NM (Cu, Cr or Al)/Ni80Fe20 trilayers”; authors: Adriel Belmonte, A.A. Pérez-Martínez, D. Velázquez-Rodríguez, J.L. Ampuero-Torres, L. Avilés-Félix, J.E. Gómez, A. Butera
Enio Lima Jr. (CONICET); oral presentation: “On the mechanisms of heterogeneous catalysis by magnetic ferritenanoparticles for H2O2 decomposition in reactive oxygen species”; authors: Enio Lima Jr., Marco Antonio Morales Ovalle, Nahuel Nuñes, Teobaldo E.Torres, Marcelo Vasquez Mansilla, Dina Tobia, Martín E. Saleta, Gerardo F.Goya, Roberto D. Zysler, Elin L. Winkler
Daniela Valdés (CONICET); oral presentation: “Thermographical method to assess the performance of magnetic nanoparticles in hyperthermia experiments through spatiotemporal emperature profiles”; authors: D.P. Valdés, T.E. Torres, A.C. Moreno Maldonad, G. Urretavizcaya, M.S.Nadal, M. Vásquez Mansilla, R. D. Zysler, G. F. Goya, E. De Biasi, E.Lima Jr
Elin Winkler (CNEA); oral presentation: “Tuning the magnetic properties from the design of nanoparticles with onion-like architecture”; authors: J.M. Núñez, F. Fabris, E.Lima Jr., R.D. Zysler, M.H. Aguirre, E.L. Winkler
J. Rodríguez (CNEA); poster presentation: “Domain structure and magnetic characterization of Tb/Co syntheticFerrimagnets”; authors: J. Rodríguez, M. Guyon, L. Avilés-Félix, S. Auffret, R. Sousa, I. L.Prejbeanu, A. Bruchhausen, E. de Biasi, J. Curiale
Nahuel Núñez (CONICET); poster presentation: “Effect of copper content in magnetic and catalytic properties of ironoxide nanoparticles”; N. Núñez, E. Lima Jr., M. Vásquez Mansilla, F. Goya, A. Gallo-Córdova, M.P. Morales, E.L. Winkler
Daniela Valdés (CONICET); poster presentation: “Exploring the effects of size, anisotropy, frequency, and interactions on magnetic nanoparticle performance in hyperthermia applications”; authors: D. P. Valdés, E. Lima Jr., R.D. Zysler, G.F. Goya, E. De Biasi.

Secondment of Dr. Mario C.G. Passeggi (CONICET, Argentina) to University of Zaragoza/INMA: discussing theoretical and experimental work on surface physics of magnetic materials

Dr Mario C.G. Passeggi director of the Surface Physics Group of the Institute of Technological Development for the Chemical Industry (INTEC, CONICET, Argentina) made a secondment to the University of Zaragoza/INMA in the framework of the Ultimate I project. The research lines of his group are directed at studying the surface properties of materials comprising both the surface physics and interfaces laboratories and the theoretical physics of surfaces. The second included meetings with Spanish researchers, evaluation of the ESR research already done in the past two years of the project, and setting precise targets for the remaining project period.

The Surface Physics Group is part of the Institute, the Instituto de Física del Litoral (IFIS Litoral), maintaining the double dependence on CONICET and the Universidad Nacional del Litoral.

Scientific publication by ULTIMATE-I researchers from CNEA-CONICET Argentina and CIC nanoGUNE BRTA San Sebastian, Spain: « Magnetization reversal phenomena in thin films presenting stripe domain »

The authors present a study of properties related to the magnetization reversal process in two thin film samples presenting magnetic stripe domains: Fe0.82Ga0.18 (Fe-Ga) and Ni0.81Fe0.19 (permalloy). In Fe-Ga thin films, they focus on the magnetization reversal driven by thermal activation, by considering the magnetic viscosity behavior. The results suggest that the reversal process occurs gradually, where the magnetization switches direction via ~10 nm-long jumps of the magnetic domain walls. On the other hand, vectorial hysteresis loops were performed in permalloy thin films with the aim of studying the behavior of the transverse magnetization component (perpendicular to the applied field) during the magnetization reversal process. They show that the measurement of the transversal magnetization component shows a much higher sensitivity for the determination of the in-plane magnetic anisotropy than the usual hysteresis loops where the magnetization is parallel to the applied field. Moreover, this allows them to highlight the competition between the intrinsic and rotatable anisotropies in thin film-present stripe domains.

P. López Duque, D. Goijman, A. Sarmiento, G. Ramírez, L. Avilés-Félix, J. Gómez, M. Eddrief, A. Butera, P. Vavassori, and J. Milano, and D. Niebieskikwiat, Magnetization Reversal Phenomena in Thin Films Presenting Stripe Domains.

Available at SSRN: or

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

Repository link

All Open Access, Green Submitted