Physics of the Solid State
Dynamics of magnetization of a uniaxial nanoparticle in the region of noncollinear ferromagnetic resonance
Shutyi A. M.1, Sementsov D. I.1
1Ulyanovsk State University, Ulyanovsk, Russia
Email: sementsovdi42@mail.ru
Resonance dynamics of the magnetic moment of a uniaxial ellipsoidal nanoparticle under its magnetic biasing along the symmetry axis and excitation by a transverse high-frequency field is studied with the parameters (frequency, magnetic bias field and shape parameter), corresponding to the noncollinear orientation of equilibrium magnetization and the external static field. We revealed the frequency regions where precession becomes nonlinear at a weak alternating field and dynamic bistability, as well as complex spatial attractors and chaos are implemented. Keywords: ellipsoidal nanoparticle, ferromagnetic resonance, static and high-frequency field, nonlinearity, effective anisotropy, bistability, regular and chaotic precession.
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