Curvature-induced emergence of a second critical field for domain wall dynamics in bent nanostripes
Autor
Bittencourt, G. H.R.
Moreno, Roberto
Cacilhas, R.
Castillo-Sepúlveda, Sebastian
Chubykalo-Fesenko, O.
Altbir, Dora
Carvalho-Santos, Vagson Luiz
Resumen
We investigate the dynamics of a transverse domain wall (DW) in a bent nanostripe under an external field and spin-polarized current. Besides the standard Walker breakdown phenomenon, we show the emergence of a second Walker-like critical field, which depends on both the curvature of the nanostripe and its cross section geometry. At this field, DW can change its phase, i.e., can be re-oriented along another direction with respect to the nanostripe face. Additionally, we show that the amplitude and frequency of the DW oscillations above the Walker breakdown field also depend on the nanostripe geometry and can be controlled by external stimuli. Our results evidence that the inclusion of local curvatures in nanostripes is an important component for applications that demand an adequate control of the DW phase by the proper choice of external stimuli.
Colecciones
Ítems relacionados
Mostrando ítems relacionados por Título, autor o materia.
-
Article
Influence of curvature on the dynamical susceptibility of bent nanotubes (2022)
Saavedra, Eduardo; Castillo-Sepúlveda, Sebastian; Corona, Rosa M.; Altbir, Dora; Escrig, Juan; Carvalho-Santos, Vagson Luiz (Elsevier B.V., 2022-04)In this work we analyze the influence of curvature on the dynamic properties of the magnetization in bent nanotubes. Our results show that both the resonance frequencies and the number of resonant peaks have a strong ... -
Article
Motion-induced inertial effects and topological phase transitions in skyrmion transport (2021)
Teixeira, A. W.; Castillo-Sepúlveda, Sebastian; Rizzi, Leandro G.; Núñez, Álvaro S.; Troncoso, Roberto E.; Altbir, Dora; Fonseca, Jakson M.; Carvalho-Santos, Vagson Luiz (NLM (Medline), 2021-05-28)When the skyrmion dynamics beyond the particle-like description is considered, this topological structure can deform due to a self-induced field. In this work, we perform Monte Carlo simulations to characterize the skyrmion ... -
Article
Shifts in the skyrmion stabilization due to curvature effects in dome- And antidome-shaped surfaces (2020)
Carvalho-Santos, Vagson Luiz; Corona, Rosa M.; Altbir, Dora; Castillo-Sepúlveda, Sebastián (American Physical Society, 2020-07-01)The study of curvature-induced effects on the properties of nanostructures has become a cornerstone of magnetism. However, several methodologies usually used for studying nanoscale magnetic systems present difficulties for ...