2019/08/23 by Daniel Meilak, Meilak, Daniel, Sarah Jenkins +6
Engineering · Materials Science · Physics and Astronomy · #Advanced Materials Characterization Techniques #Chemical and Physical Properties of Materials #Diamond and Carbon-based Materials Research #FOS: Physical sciences #Ion-surface interactions and analysis #Magnetic properties of thin films #Materials Science (cond-mat.mtrl-sci) #Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
paper · pdf · doi:10.48550/arxiv.1908.08885
openalex publication_date 2019/08/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Ultrafast magnetization dynamics probes the most fundamental properties of\nmagnetic materials, exploring questions about the fundamental interactions\nresponsible for magnetic phenomena. Thermal effects are known to be extremely\nimportant for laser-induced dynamics in metallic systems, but the dynamics of\ntopological magnetic structures are little understood. Here we apply a\nmassively parallel atomistic spin dynamics simulation to study the response of\na permalloy vortex to a 50 fs laser pulse. We find that macroscopically the\nshort timescale dynamics are indistinguishable from the bulk, but that strong\nedge spin waves lead to a complex time evolution of the magnetic structure and\nlong-lived oscillations on the nanosecond timescale. In the near future such\nsimulations will provide unprecedented insight into the dynamics of magnetic\nmaterials and devices beyond the approximations of continuum micromagnetics.\n