We study magnetization oscillations in a uniformly magnetized nanomagnet driven by ac excitations (external fields and injected currents) when the frequency of excitation is close to ferromagnetic resonance frequency. By using separation of time scale and the averaging technique, we derive dynamical equations which can be studied by the methods of dynamical system theory. This leads to an analytical description of nonlinear frequency response and to the the analysis of relevant bifurcation phenomena. The theoretical results are compared with numerical simulations
Analytical Treatment of Ferromagnetic Resonance in Nanomagnets
Scalera V.;
2017-01-01
Abstract
We study magnetization oscillations in a uniformly magnetized nanomagnet driven by ac excitations (external fields and injected currents) when the frequency of excitation is close to ferromagnetic resonance frequency. By using separation of time scale and the averaging technique, we derive dynamical equations which can be studied by the methods of dynamical system theory. This leads to an analytical description of nonlinear frequency response and to the the analysis of relevant bifurcation phenomena. The theoretical results are compared with numerical simulationsFile in questo prodotto:
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