Abstract
The process of pulsed 90° magnetization of ferrite-garnet films was studied. These films, in addition to easy-plane anisotropy, have biaxial anisotropy in the film plane with an effective field H K2 ≅ 40–55 Oe. the pulsed magnetization curve contains two portions separated by a kink observed at a field pulse amplitude H p=H *p ≅ 16–18 Oe. An analysis of the magnetization signals showed that the restoring torque, which is mainly caused by biaxial-anisotropy forces, is overcome in fields H p ≥ H *p and that magnetization rotation occurs. In fields H p < H *p , the magnetization vector rotates at the initial stage only and the angle of rotation ϕin is less than 25°–26°. The field H *p and angle ϕin are calculated. The results of the calculations are confirmed by experimental data. In fields H p > H *p , the process of magnetization is accompanied by oscillations of the magnetization vector. In contrast to free magnetization oscillations, these oscillations are nonlinear and the frequency of the first harmonic (≈5 × 108 Hz) is much lower than that for free oscillations, (7–12) × 108 Hz. Oscillations are excited at a pulse rise time of ≈6 ns.
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Original Russian Text © E.I. Il’yashenko, O.S. Kolotov, A.V. Matyunin, O.A. Mironets, 2006, published in Fizika Tverdogo Tela, 2006, Vol. 48, No. 2, pp. 280–285.
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Il’yashenko, E.I., Kolotov, O.S., Matyunin, A.V. et al. 90° pulsed magnetization of ferrite-garnet films with easy-plane anisotropy. Phys. Solid State 48, 297–302 (2006). https://doi.org/10.1134/S106378340602017X
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DOI: https://doi.org/10.1134/S106378340602017X