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MS Final Examination – Jonah Gross


Tuesday, December 4, 2012 9:00 AM - 11:00 AM

Development of Acoustic Transducers for use in the Parametric Pumping of Spin Waves
The work detailed here is the development of simulations and fabrication techniques used for the construction of thin-film acoustic transducers for use in the parametric pumping of spin waves. The Mason Model, a 1-D equivalent circuit simulating the responses of multilayer acoustic transducers, is implemented using ABCD-parameters in MATLAB to determine the expected response from fabricated devices. The simulation is tested by varying device parameters and comparing the changes in device resonance response to those of prior published results. Three-layer thin-film acoustic transducers were also fabricated. These transducers use zinc oxide (ZnO) as a piezoelectric layer with aluminum (Al) electrodes. Construction is accomplished using the common thin-film fabrication techniques of sputter and evaporation deposition and etching and lift-off patterning processes. The response of the fabricated transducers is compared to that of the simulation response by observing the transducers resonance frequency and characteristics. These results validate the simulation’s and transducer fabrication process’ usefulness for the design and fabrication of an acoustic spin wave amplification system.

Major Advisor: Pallavi Dhagat
Committee: Thomas Plant
Committee: Alan Wang
GCR: Leonard Coop


Kelley Engineering Center (campus map)
4107
Nicole Thompson
541-737-3617
Nicole.Thompson at oregonstate.edu
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