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Center for Nonlinear Studies |
Our presentation will be divided into short talks, with related topics. Our research involved the synthesis of many magnetic systems. Including nanotubes through atomic layer deposition (ALD) and nanowires by electrodeposition, booth within alumina membranes, and even tubes in polymeric nanofibers. Also, we will present planar systems as thin films by ALD, synthesis of magnetic nanodomes using alumina templates, and by electron beam lithography we have synthesized interconnected pentagonal networks, spin-ices, and dots. In some cases, we also Include thin multilayered materials with DMI interactions.
By analytical calculations and micromagnetic simulations, it’s possible to deeper understand the behavior of these systems, and allow to study magnetic systems previous to the experimental synthesis, as the case where we study the effect of the width of the vertex connection of a Permalloy honeycomb lattice on the hysteresis curves and the system's dynamic magnetic susceptibility. And even in more complex systems where we study the gyrotropic dynamics of magnetic vortices by surface acoustic waves (SAWs), and, we investigate injection locking of a DC-driven vortex spin-transfer torque oscillator (STO) using SAWs to enhance the STO’s signal, for its synchronization with external inputs. Besides, we present three possible device applications based on skyrmion dynamics in nanorings: a tunable distributed clock, an alternator, and a skyrmion-based energy harvester. Also we will show layered materials for ion-intercalation type batteries, which are studied by using DFT machinery to study alternative cathode materials.
Speakers:
Eduardo Cisternas (Universidad de La Frontera)
Juan Palma (Universidad Central de Chile)
Alejandro Pereira (Universidad Adolfo Ibáñez)
Alejandro Riveros (Universidad Central de Chile)
Host: Cristiano Nisoli and Frank Barrows (T-4)