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The influence of transverse perturbations on the propagation of picosecond acoustic pulses in a paramagnetic crystal

  • Magnetism and Ferroelectricity
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Abstract

The influence of transverse perturbations on the dynamics of a picosecond soliton-like acoustic pulse in a paramagnetic crystal in an external magnetic field is investigated. The nonlinear and dispersion effects are governed by the intrinsic properties of the crystal and the spin-phonon interaction. The effect of different nonlinear mechanisms and an external magnetic field on the stability against transverse perturbations is analyzed. It is shown that, in the absence of paramagnetic impurities, there can exist only a compression pulse that propagates in a defocusing regime. In the presence of paramagnetic ions in the crystal, there can arise rarefaction pulses that, under specific conditions, can propagate in self-focusing and self-channeling regimes.

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Translated from Fizika Tverdogo Tela, Vol. 47, No. 10, 2005, pp. 1839–1845.

Original Russian Text Copyright © 2005 by Buga\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \), Sazonov.

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Bugai, A.N., Sazonov, S.V. The influence of transverse perturbations on the propagation of picosecond acoustic pulses in a paramagnetic crystal. Phys. Solid State 47, 1914–1921 (2005). https://doi.org/10.1134/1.2087746

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