Bifurcation magnetic resonance in films magnetized along hard magnetization axis |
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Authors: | Tatiana M. Vasilevskaya Dmitriy I. SementsovAnatoliy M. Shutyi |
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Affiliation: | Ulyanovsk State University, Leo Tolstoy 42, 432017 Ulyanovsk, Russian Federation |
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Abstract: | We study low-frequency ferromagnetic resonance in a thin film magnetized along the hard magnetization axis performing an analysis of magnetization precession dynamics equations and numerical simulation. Two types of films are considered: polycrystalline uniaxial films and single-crystal films with cubic magnetic anisotropy. An additional (bifurcation) resonance initiated by the bistability, i.e. appearance of two closely spaced equilibrium magnetization states is registered. The modification of dynamic modes provoked by variation of the frequency, amplitude, and magnetic bias value of the ac field is studied. Both steady and chaotic magnetization precession modes are registered in the bifurcation resonance range. |
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Keywords: | Magnetic resonance Magnetization precession Bistability Bifurcation field Trajectory of precession |
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