Electromechanical properties of Co0.6 Zn0.4 Fe2O4 ferrite transducer

Abstract Co 0.6 Zn 0.4 Fe 2 O 4 ferrite has been prepared by the general ceramic method. The resonance frequency of the disk for the radial and thickness mode was investigated as a function of mechanical stress. The increase of the resonance frequency of the transducer is attributed to domain wall motion inhibition. The increase of ultrasonic velocity with increasing mechanical stress can be explained as due to retarding the oscillation of the ferrimagnetic domains under applied high-frequency electric field. The induced strain increases the resonance frequency. The high values of the electromechanical coupling factor for the radial mode K p , and thickness mode, K t , indicate that this composition is useful for producing high-frequency ultrasonic waves that can be used in modern technology.