Abstract: The magnetostatio surface and volume waves are dispersive in ferrimagnetio film wave guide and exhibit wave vector anisotropy go that, in general,the energy flow and wave veotor are noncollinear. Theoretical investigation is made in this paper of variations of the direction of energy flow of magnetostatio surface and volume waves with the changes of the direction of the biasing magnetic field.

Key words: magnetostatic surface wave, magnetostatic volume wave, ferrimagnetic film