2011/10/04 by Arne Vansteenkiste, Ben Van de Wiele, Vansteenkiste, Arne +17
Engineering · Physics and Astronomy · #Characterization and Applications of Magnetic Nanoparticles #FOS: Physical sciences #Fluid Dynamics and Thin Films #Magnetic properties of thin films #Materials Science (cond-mat.mtrl-sci) #Other Condensed Matter (cond-mat.other) #Theoretical and Computational Physics
paper · pdf · doi:10.48550/arxiv.1110.0828
openalex publication_date 2011/10/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Magnetic vortex gyration in a 500 nm wide, 50 nm thick Permalloy square\nplatelet was investigated using time-resolved scanning transmission x-ray\nmicroscopy and micromagnetic simulations. The response of the vortex core on an\nin-plane oscillating magnetic field was studied as a function of the excitation\nfrequency and amplitude. Non-linear behavior was observed in the form of a\nredshift of the gyrotropic resonance. I.e., when the excitation amplitude was\nincreased, the resonance frequency was found to decrease. The nonlinearity is\nin agreement with extensive micromagnetic simulations. This work complements\nprevious reports on thinner nanostructures where a frequency blueshift was\nobserved.\n