• Article

      Curvature-induced emergence of a second critical field for domain wall dynamics in bent nanostripes (2021) 

      Bittencourt, G. H.R.; Moreno, Roberto; Cacilhas, R.; Castillo-Sepúlveda, Sebastian; Chubykalo-Fesenko, O.; Altbir, Dora; Carvalho-Santos, Vagson Luiz (American Institute of Physics Inc., 2021-04-05)
      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 ...
    • 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

      Magnetic hopfions in toroidal nanostructures driven by an Oersted magnetic field (2021) 

      Castillo-Sepúlveda, Sebastian; Cacilhas, R.; Carvalho-Santos, Vagson Luiz; Corona, Rosa M.; Altbir, Dora (American Physical Society, 2021-11-01)
      The search for magnetic hopfions has been the focus of intense research during the last years. In this direction, and using micromagnetic simulations, we studied the magnetization reversal mechanism in toroidal nanoparticles ...
    • 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 ...