Physics of the Solid State
Ferromagnetic resonance in a single-domain particle with uniaxial anisotropy under longitudinal excitation
Vasilevskaya T. M1, Sementsov D. I.1, Shutyi A. M.1
1Ulyanovsk State University, Ulyanovsk, Russia
Email: sementsovdi42@mail.ru
An additional resonance peak near the effective anisotropy field HKN is identified on the basis of analysis of magnetization precession dynamics of single-domain uniaxial magnetic ellipsoid particle in the spectrum of ferromagnetic resonance, corresponding to bias along the "hard" axis, under longitudinal excitation by a weak high-frequency field. This peak is related to manifestation of the angular bistability arising due-to the presence of two symmetrical angular equilibrium positions of particle magnetization in a field that is weaker than the HKN field. Key words: ferromagnetic resonance, "hard" plane, longitudinal excitation, bistability, effective anisotropy, precession trajectory, high-frequency response.
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