2025/11/28 by Jorge F. Soriano, Soriano, Jorge F., Eugene M. Chudnovsky +1
Physics and Astronomy · Materials Science · #Magnetic properties of thin films #Theoretical and Computational Physics #Chemical and Physical Properties of Materials
paper · pdf · doi:10.48550/arxiv.2511.23346
We demonstrate that moving edge dislocations can induce the reversal of magnetization in a ferromagnetic film due to the Barnett effect. The dynamics of magnetization is studied numerically within a discretized Landau-Lifshitz equation on a hexagonal lattice containing over 105 sites. Local coordinate frames coupled to the crystallographic axes for each spin are used together with the laboratory coordinate frame. The parameters of a hexagonal close-packed cobalt lattice have been chosen for illustration. The magnetization reversal from a metastable initial state created by the external magnetic field occurs on a time scale of a few picoseconds. Our results imply that fast local elastic twists generated by moving dislocations serve as an important mechanism of magnetization dynamics in solids subjected to a mechanical stress.