Interface-Engineered Complex Oxide Heterostructures with Designable Physical Properties

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dc.contributor.advisorChen, Chonglin
dc.contributor.advisorWill-Cole, Melanie
dc.contributor.authorEnriquez, Erik
dc.contributor.committeeMemberBhalla, Amar
dc.contributor.committeeMemberChen, Liao Y.
dc.contributor.committeeMemberYacaman, Miguel J.
dc.contributor.committeeMemberWhetten, Robert
dc.date.accessioned2024-02-09T20:49:13Z
dc.date.available2024-02-09T20:49:13Z
dc.date.issued2014
dc.descriptionThis item is available only to currently enrolled UTSA students, faculty or staff. To download, navigate to Log In in the top right-hand corner of this screen, then select Log in with my UTSA ID.
dc.description.abstractInvestigations were made in attempts to improve the compositional and structural quality of SrTiO3 (STO) thin films as grown by the Gen 2 MOCVD (CoNotS) system at the United States Army Research Laboratory (ARL) in Aberdeen Proving Ground, MD, as well as to increase the homogeneity over sample area. In all of the aforementioned aspects, sample quality was notably improved by modifications to both the hardware and growth parameters. This research is performed at ARL under the guidance of Melanie Will-Cole, Sr. Research Physical Scientist. The effect of A and B-site substitution to perovskite cobaltate thin films on the diffusion and surface exchange kinetics were investigated for various doping agents. Enhancement of the diffusion activity was observed, as well as a tuning of the temperature of peak activity. Observed oscillatory behavior in the resistance response under oxidation reactions is theorized to indicate a layer-by-layer oxygen vacancy exchange diffusion mechanism of charge carrier ion species. The obtained results suggest that LnBCO materials, in particular those with properties tuned by A and B-site fractional substitution such as Pr(Ba0.5,Sr0.5)(Co1.5,Fe0.5)5.5+d (PBSCFO) are excellent candidates for the development of low or intermediate temperature energy conversion devices and gas sensor applications.
dc.description.departmentPhysics and Astronomy
dc.format.extent165 pages
dc.format.mimetypeapplication/pdf
dc.identifier.urihttps://hdl.handle.net/20.500.12588/3338
dc.languageen
dc.subjectFerroelectric
dc.subjectMultifunctional
dc.subjectPerovskite
dc.subjectSolid Oxide Fuel Cell
dc.subjectThin Films
dc.subject.classificationMaterials Science
dc.subject.classificationPhysical chemistry
dc.titleInterface-Engineered Complex Oxide Heterostructures with Designable Physical Properties
dc.typeThesis
dc.type.dcmiText
dcterms.accessRightspq_closed
thesis.degree.departmentPhysics and Astronomy
thesis.degree.grantorUniversity of Texas at San Antonio
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy

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