MAGNETOSTRICTIVE GENERATION OF TRANSVERSEE MICROWAVE PHONONS OF 10-GHZ WITHOUT EXTERNALL FIELD

To generate transverse microwave phonons in nonpiezoelectric crystals one has to use ferromagnetic filmtransducers. This method needs a static magnetic field of some kOe. It is shown in this paper that it is possible to shift the resonance field to lower values by applying mechanical stress to the ferromagnetic film. Due to the broad linewidth even at zero field transverse phonons are generated. The measured conversion factor for generation and detection is -50 dB each which is comparable with values by other methods. The conversion factor depends strongly on the conditions during evaporation of the film. © 1969 Springer-Verlag.