Emergent electromagnetism induced by topological defects created during magnetization reversal in nanowires
arXiv:1711.03511 · doi:10.1103/PhysRevLett.121.097202
Abstract
We report that the irreversible magnetization switching process in ferromagnetic nanoparticles is governed by the formation and dynamics of topological point-defects in the form of hedgehog-antihedgehog pairs. After nucleation, these pairs rapidly separate with speeds exceeding domain wall velocities, and they generate an emergent electric field of solenoidal character and substantial magnitude.
arXiv comment6 pages, 4 figures
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- Micromagnetic modelling of magnetic domain walls and domains in cylindrical nanowires
- Tuneable terahertz oscillation arising from Bloch-point dynamics in chiral magnets
- Phase degree of freedom and topology in multiple- spin textures
- Domain wall damped harmonic oscillations induced by curvature gradients in elliptical magnetic nanowires
- Prediction of confined and controllable Bloch points in nanocubes of chiral magnets
- Ultrafast manipulations of nanoscale skyrmioniums
- Nonlinearity and Topology
- Regularized Micromagnetic Theory for Bloch Points
- An experimental analysis from the magnetic interactions in nanowire arrays
- Magnetic Bloch-point hopping in multilayer skyrmions and associated emergent electromagnetic signatures