Vincent G. Harris
Carmine Vittoria, Yajie Chen, Anton Geiler
Date of Award
Master of Science
Department or Academic Unit
College of Engineering, Department of Electrical and Computer Engineering
electrical engineering, electromagnetics, magnetic field sensor, magnetoelectric sensor, magneto-electronics, magnetostriction, modulation technique, sensitivity enhancement
Electrical and Computer Engineering | Engineering
Magnetoelectric (ME) heterostructural laminate composites have recently demonstrated high sensitivity room temperature operation in magnetic field sensing applications. Traditionally, a static (DC) magnetic field is applied to these sensors to enable optimal magnetostrictive response. In this thesis, the non-linear nature of the magnetostrictive response of a ME heterostructure is utilized, by applying a modulation magnetic field, to demonstrate an improvement by a factor of 11.62x in peak sensitivity and by 57.43 dB in 0-Hz signal-to-noise ratio of a sensor consisting of a longitudinally magnetized and transversely poled lamination of Metglas/PZT/Metglas layers in comparison with a conventional DC biased configuration. The ME sensor modulated by an AC magnetic field, tuned to stimulate an electro-magneto-mechanical resonance, in conjunction with a lock-in amplifier further exhibits enhanced environmental noise immunity, 1/f noise mitigation, and does not require a DC magnetic bias field. Combined, these advantages hold promise for the development of miniature ME sensor elements for size- and weight-sensitive applications.
Scott Matthew Gillette
Gillette, Scott Matthew, "Dynamic magnetostrictive response of heterostructural magnetoelectric magnetic field sensors" (2011). Electrical and Computer Engineering Master's Theses. Paper 54. http://hdl.handle.net/2047/d20001035
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