Selvamanickam, Venkat2020-06-04May 20202020-05May 2020https://hdl.handle.net/10657/6669Ion beam assisted deposition (IBAD) is a promising way to realize high efficient and scalable manufacturing of a single-crystal-like, biaxially-textured thin film on various substrates. This biaxially-textured film has been employed for different kinds of purposes, such as epitaxial growth of single-crystal-like high-temperature superconductor (HTS) films and replacing the wafer-based epitaxial process for thinfilm optoelectronic and electrical applications such as flexible solar cells and thin-film transistors. This dissertation is focused on different IBAD processes that could benefit both the semiconductor and superconductor fields. A highly biaxially-textured IBAD TiN was demonstrated on the Hastelloy tape without foreign oxide seed layers. This enables the feasibility of all-electrically conductive buffers on Hastelloy. The conventional architecture of LaMnO3/IBAD MgO for HTS tapes was also improved through the use of Ag/TiN intermediate layers. The buffer architecture was optimized to achieve significant improvement in texture and avoid possible crystalline defects. The texture of LaMnO3 was improved to (002) Δω of 1.7⁰ and (110) Δϕ of 2.45⁰ using Ag/TiN layers. Additionally, IBAD MgO and related HTS cap layers have been developed on flexible non-metallic tape. The non-metallic substrate could extend the scope of HTS materials to unconventional applications such as high-quality flexible MRI receiving coils and transmission lines for cryogenic quantum computing systems. Finally, a novel architecture of single-crystalline-like ultra-bandgap semiconductor β-Ga2O3 film on IBAD MgO-capped flexible Hastelloy was demonstrated. The β-Ga2O3 film shows a strong biaxial texture with (400) Δω of 1.54⁰ and {002} Δϕ of 4.81⁰. The crystal orientation relationship between the β-Ga2O3 and IBAD MgO was also studied.application/pdfengThe author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).Ion beam assisted depositionBiaxially-textured film2020-06-04Thesisborn digital