Microwave screening by conduction currents in thin magnetic films: application in stripline broadband FMR

TL;DR

This paper investigates how conduction currents in thin magnetic films influence microwave screening and can be used to excite or suppress standing spin waves, aiding the study of spin wave modes in heterostructures.

Contribution

It demonstrates the control of standing spin wave excitation via eddy current inhomogeneity in thin conducting magnetic films, with applications in broadband ferromagnetic resonance.

Findings

Enhanced eddy current inhomogeneity affects spin wave excitation.

Standing spin waves can be selectively excited or suppressed.

Effect observable in films below magnetic skin depth.

Abstract

Ferromagnetic resonance in conducting magnetic bilayers was studied using microstrip transducers. It was found that excitation or suppression of standing spin waves could be achieved through enhanced inhomogeneity of eddy currents in the bilayer caused by finite thickness. This effect is observable in films with thicknesses below the magnetic skin depth and can be used to study standing spin wave modes in heterostructures.