Comparison of measured and simulated spin-wave mode spectra of magnetic nanostructures.

ABSTRACT: Motivated by the importance of magnetization dynamics in nanomagnets for the development and optimization of magnetic devices and sensors, we measured and modeled spin wave spectra in patterned elliptical nanomagnets. Ferromagnetic resonance spectra for multiple nanomagnets of Ni₈₀Fe₂₀, fabricated by electron-beam lithography to have nominal short-axes of 200 nm or 100 nm, were measured by use of heterodyne magneto-optical microwave microscopy. Scanning electron microscope images taken of the same nanomagnets were used to define element shapes for micromagnetic simulations. The measured spectra show significant differences between nominally identical nanomagnets, which could be only partially attributed to uncontrolled shape variations in the patterning process, as ev

SUBMITTER: Nembach HT 

PROVIDER: S-EPMC11653420 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature