Magnetic hopfions in toroidal nanostructures driven by an Oersted magnetic field
S. Castillo-Sepúlveda, R. Cacilhas, Vagson L. Carvalho‐Santos, R.M. Corona, D. Altbir
Abstract
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 under the action of an Oersted magnetic field. Our results evidence the nucleation of four magnetic configurations as a function of geometry, two of them being hopfion-like textures. These mechanisms are preferred for large toroidal structures. The annihilation of such texture is indicated by strong changes in the energy, which characterizes a topological transition.
Topics & Concepts
Condensed matter physicsToroidMagnetic fieldMagnetizationPhysicsNucleationAnnihilationFocus (optics)Texture (cosmology)OpticsPlasmaQuantum mechanicsComputer scienceImage (mathematics)Artificial intelligenceThermodynamicsMagnetic properties of thin filmsAdvanced Memory and Neural Computing2D Materials and Applications