ELECTRONIC MECHANISM OF MAGNETIC-FIELD-IN DUCED CHANGE OF SOUND-VELOCITY IN MAGNETICALLY ORDERED METALLIC SUPERLATTICES

It is shown that magnetic-deformation interaction of electrons with el astic oscillations in metallic magnetic superlattices causes the depen dence of sound velocity on magnetic field strength to appear, which is associated with a change of the relative orientation of ferromagnetic metal layers magnetization. A correlation was predicted between simil ar magnetic-field dependences of elastic modules slid magnetoresistanc e in the superlattices with a giant magnetoresistance. The formulas ar e given describing the manifestation of the effect at normal ultrasoun d, penetration and in the spectrum of Love's waves for the structures consisting of the multilayered film under consideration and bulk cryst al sublayer.