Abstract
We investigate the dynamics of exchange-coupled ferromagnetic films in the nonlinear limit and find a number of interesting features. The introduction of asymmetries in the magnetic driving field can produce a power-dependent localization of the magnetization oscillations, in one film or the other, by way of the optic mode frequency shifting in the large field limit. A nonlinear mixing of the acoustic and optic modes in the antiferromagnetically coupled system leads to quasiperiodic and multiperiodic composite modes. Numerical ferromagnetic resonance experiments will show additional absorption peaks (in the 20--50 GHz range) which have a rapid increase in strength with input power. The results are calculated through linearization techniques and numerical solutions of the Landau-Lifshitz-Gilbert equation. The nonlinear (and linear) behavior is illustrated through Poincar\'e section bifurcation diagrams.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
