Quasi-solitonic propagation modes of two-component acoustic video pulses in a paramagnetic crystal |
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Authors: | S. V. Voronkov S. V. Sazonov |
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Affiliation: | (1) Kaliningrad State Technical University, Kaliningrad, 236000, Russia |
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Abstract: | Nonlinear propagation of longitudinal-transverse acoustic pulses down to a length of one cycle (video pulses) in a low-temperature paramagnetic crystal in the direction parallel to an external magnetic field is investigated theoretically. The case of a crystal with paramagnetic impurity ions with effective S=1/2 spin is considered. It is shown that, due to spin-phonon interaction, two-component acoustic pulses can propagate in the form of high-power quasi-solitons. Conditions are determined for the formation of exponentially localized subsonic rational solitons which propagate with a velocity higher than the velocity of transverse sound and which have a transverse component with a rotating plane of polarization. |
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