Modelling ferromagnetic resonance in magnetic multilayers: Exchange coupling and demagnetisation-driven effects

Ferromagnetic resonance in thin films and heterostructures is studied by micromagnetic simulation. Using a Fourier transform, we obtain the power spectrum of modes of precession and demonstrate that they agree with experimental results. Additional resonance modes associated with demagnetization effe...

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Bibliographic Details
Main Authors: Baker, A, Davies, C, Figueroa, A, Shelford, L, van der Laan, G, Hesjedal, T
Format: Journal article
Language:English
Published: American Institute of Physics Inc. 2014
Description
Summary:Ferromagnetic resonance in thin films and heterostructures is studied by micromagnetic simulation. Using a Fourier transform, we obtain the power spectrum of modes of precession and demonstrate that they agree with experimental results. Additional resonance modes associated with demagnetization effects are observed and studied as a function of the sample dimensions. Sufficiently confined geometries lead to a reorientation of the resonance mode, and a dramatic change in its frequency. Finally, the simulations are extended to exchange-coupled bilayers where energy is transferred between magnetic materials. © 2014 AIP Publishing LLC.