Oregon State University

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Event Details

MS Final Examination – Pratim Chowdhury

Tuesday, November 12, 2013 3:00 PM - 5:00 PM

Designing Bulk Acoustic Wave Resonators for Parametric Amplification of Spin Waves
Spintronics is an emerging field of research dealing with devices that can potentially exploit the additional degree of freedom provided by the electron spin along with or instead of the conventional electronic charge. One of the most promising aspects of spintronics is the potential use of magnetostatic spin waves as information carriers in logic devices - where information is encoded on the electron spin. A major obstacle in making this a practically viable alternative to conventional electronics is the very large intrinsic spin wave damping in all known magnetic materials. In this work, we propose an energy efficient way of parametrically amplifying spin waves by means of acoustic resonators. An equivalent electrical model of an acoustic resonator was developed to efficiently design the acoustic resonators for the desired frequency ranges. Backward volume magnetostatic spin waves were measured in Yttrium Iron Garnet films down to frequencies as low as 1.7 GHz - while acoustic resonators having acoustic resonance frequency of 4 GHz were fabricated.

Major Advisor: Pallavi Dhagat
Committee: Albrecht Jander
Committee: Brady Gibbons
GCR: Arijit Sinha 

Kelley Engineering Center (campus map)
Nicole Thompson
1 541 737 7234
Nicole.Thompson at oregonstate.edu
Sch Elect Engr/Comp Sci
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