Nonlinear self-localized magnetoelastic surface waves in antiferromagneticmedia

Types of self-localized, magnetoelastic (ME) surface waves in antiferromagn ets (AFs) are predicted, the existence of which is determined entirely by t he nonlinear properties of the AFs. The frequency spectrum of the self-loca lized ME surface waves is shown to lie in a gap between the upper quasimagn on and lower quasiphonon branches of the harmonic ME spectrum. A nonlinear Schrodinger equation for the envelope of ME waves is derived and its solito nic solutions are obtained. When spin pinning or capillary effects on the s urface of the crystal exist, we find that the nonlinear surface ME wave exc ites the volume ME wave at fundamental harmonics carrying energy into the i nterior of a crystal. (C) 1998 American Institute of Physics.