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

DOI: 10.1063/1.4868185 DOI Help

Authors: Alexander Baker (Diamond Light Source) , Carl Davies (University of Exeter) , Adriana Figueroa-garcia (Diamond Light Source) , Leigh Shelford (University of Exeter) , Thorsten Hesjedal (University of Oxford) , Gerrit Van Der Laan (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Applied Physics , VOL 115 (17) , PAGES 17D140

State: Published (Approved)
Published: May 2014

Abstract: 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.

Journal Keywords: Magnetic Modelling; Ferromagnetic Resonance

Subject Areas: Physics, Materials, Engineering

Technical Areas: Theoretical Physics

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