Kotov L. N. 1, Sudienkov Yu. V.2, Lasek M. P.1, Chertishcheva S. A. 2, Kalinin Yu. E. 3, Sitnikov A. V.3
1Syktyvkar State University, Syktyvkar, Russia
2St. Petersburg State University, St. Petersburg, Russia
3Voronezh State Technical University, Voronezh, Russia
Email: kotovln@mail.ru
Experiments on excitation of elastic pulses by nanosecond laser pulses were carried out, and their propagation in the CoFeB/SiO2 composite films with different magnetic structures was studied. The highest amplitude of the excited elastic pulses was observed in films with the stripe magnetic structure. Maxima of the amplitude and power of the elastic pulse spectrum components were found at the frequencies of 61 and 72 MHz for the stripe-magnetic-structure films; the maxima are associated with oscillations of the structures magnetic stripes excited by the nanosecond laser pulse. The study has shown that a bilayer lavsan-composite film can play the role of an acoustic resonator for excited elastic pulses at the frequencies under consideration. Keywords: elastic and laser pulses, composite metaldielectric films, magnetic structure, magnetic field.
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