SPECTRA OF COUPLED MAGNETOELASTIC WAVES AND PECULIARITIES OF PHASE-TRANSITIONS IN EASY-PLANE FERROMAGNETS UNDER MECHANICAL BOUNDARY-CONDITIONS

Possible types of phase transitions as well as the spectra of coupled magnetoelastic waves are studied in an easy-plane ferromagnet with a r igidly fixed face. It is shown that the presence of such mechanical bo undary conditions leads to a change in the type of phase transition. T he dynamic properties of the system become most interesting at the poi nt of absolute instability of the system rather than at the phase tran sition point. (C) 1998 American Institute of Physics.