Listar Investigación y Desarrollo por autor "Altbir, Dora"

Mostrando ítems 1-9 de 9

    • Article

      Controlling domain wall chirality by combining hard and soft magnetic materials in planar nanostructures with wire-ring morphology (2020) 

      Corona, Rosa M.; Castillo-Sepúlveda, Sebastian; Altbir, Dora; Escrig, Juan (Elsevier B.V., 2021-01)
      Vortex domain walls (DWs) are characterized by their chirality, an important property that needs to be controlled for the use of such walls in potential technological applications. In this work we explore a wire-ring ...
    • 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

      Nucleation and Stability of Toron Chains in Non-Centrosymmetric Magnetic Nanowires (2024) 

      Castillo-Sepúlveda, Sebastián; Corona, Rosa M.; Saavedra, Eduardo; Laroze, David; Espejo, Alvaro P.; Carvalho-Santos, Vagson L.; Altbir, Dora (MDPI, 2023)
      This work analyzes the magnetic configurations of cylindrical nanowires with a bulk Dzyaloshinskii–Moriya interaction and easy-plane anisotropy. We show that this system allows the nucleation of a metastable toron chain ...
    • 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 ...
    • Article

      Skyrmion Dynamics in a Double-Disk Geometry under an Electric Current (2024) 

      Castillo-Sepúlveda, Sebastián; Vélez, Javier A.; Corona, Rosa M.; Carvalho-Santos, Vagson L.; Laroze, David; Altbir, Dora (MDPI, 2022)
      In this work, we present an analysis of skyrmion dynamics considering Dzyaloshinskii–Moriya interactions in an STNO device with a double-disk geometry. Three regimes were observed as a function of geometric parameters and ...
    • Article

      Skyrmion Dynamics in a Double-Disk Geometry under an Electric Current: Part Two (2024) 

      Castillo-Sepúlveda, Sebastián; Vélez, Javier A.; Corona, Rosa M.; Carvalho-Santos, Vagson L.; Laroze, David; Altbir, Dora (MDPI, 2022)
      Using numerical simulations, we studied the dynamics of two skyrmions nucleated in a double-disk structure. Depending on the geometry and the electric current, different regimes for the dynamical behavior of the skyrmions ...