Nanoscience and Microsystems ETDs

Publication Date

Fall 12-10-2023

Abstract

Non-intrusive solutions for communication through a sealed metal vessel requires the use of piezoelectric transducers to transmit acoustic waves through the vessel wall. This approach suffers the disadvantage of compromised security because a potential eavesdropper could decipher the correlation between digital and electric signals of both sides of the system. One solution is a mixed physics system employing magnetostrictive transducers.

For a magnetostrictive transducer to work well in this application, it would have to have a high piezomagnetic constant. This is influenced by soft magnetism and saturation magnetostriction. Nickel-Iron-Cobalt alloys are modified to retain their soft magnetic properties while increasing their magnetostriction to serve as an improvement over the performance of the baseline magnetostrictive material in the simulated and fabricated mixed physics device. Further synthesis aims to reduce eddy current losses of the material through the incorporation of phosphorus and controlling the material’s microstructure through electrodeposition under magnetic fields.

Keywords

Magnetostriction, mixed physics, signal transmission through metal, through metal communicaiton, NiFeCo, induced codeposition

Document Type

Dissertation

Language

English

Degree Name

Nanoscience and Microsystems

Level of Degree

Doctoral

Department Name

Nanoscience and Microsystems

First Committee Member (Chair)

Nathan Jackson

Second Committee Member

Fernando Garzon

Third Committee Member

Lok-kun Tsui

Fourth Committee Member

Jamin Pillars

Fifth Committee Member

Ihab El-kady

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