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Showing 1 to 14 of 14 for “"Epitaxial Thin Film"”.
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Engineering topology and correlation in epitaxial thin film kagome metals
… kagome metals, FeSn and Ni3In, stabilized in epitaxial thin film form. We characterize via transport, thermodynamic, and spectroscopic probes the emergent quantum phenomena arising from the key band structure singularities and further exploit various thin film tuning parameters to manipulate …
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Compositional order and structure of epitaxial thin film semiconductors by x-ray diffraction
Submitted by William Weathers (weathrs2@illinois.edu) on 2012-05-04T18:50:05Z No. of bitstreams: 1 1997_whiteaker.pdf: 3692358 bytes, checksum: 74f0dd77aeb74f74dcc4c5ff9e287289 (MD5)
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Magnon Transport in Insulating Magnetic Thin Films
… ferrite that has been recently stabilized in epitaxial thin-film form and has a substantial in-plane four-fold magnetic anisotropy. Employing nonlocal transport measurements, we studied magnon diffusion in MAFO along different crystallographic axes in both the uniformly magnetized state under …
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Interfacial Magnetism and Exchange Bias in Metal Oxide Thin Films
… thesis focuses on the investigations of magnetic thin film structure of cubic and perovskite transition metal oxide magnets, particularly when two different magnetic orderings are competing at such interface. The goal is to understand the various effects of an interfaces that exert on the …
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Zinc Oxide based Diluted Magnetic Semiconductors
… as diluted magnetic semiconductors (DMS) as epitaxial thin film structures using the process of pulsed laser deposition (PLD). These materials are envisioned to be of importance in the emerging field of spintronics where the charge as well as the spin of the charge carriers can be combined to …
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Dielectric and pyroelectric susceptibilities of epitaxial ferroelectric thin films
… require micro-fabricated architectures on thin-fi lms. Despite spectacular advances in our ability to synthesize high-quality thin fi lms, much remains to be understood regarding the evolution of their dielectric and pyroelectric properties. In the present work, we investigate the …
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New modalities for strain engineering of lead-free perovskite ferroelectric thin films
… as BiFeO3, BaTiO3, and others. Previous work on epitaxial BiFeO3 thin films have shown that large compressive strains can drive the formation of complex mixed-phase structures with enhanced electromechanical responses (4-5% strains). In this work, we probe the nanoscale distribution of phases …
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Structure-Property Relations on Strain-Mediated Multiferroic Heterostructures
Multiferroic thin-film heterostructures have attracted a great deal of attention due to the increasing demand for novel energy-efficient micro/nano-electronic devices. Both single phase multiferroic materials like BiFeO3 (BFO) thin films, and strain-mediated magnetoelectric (ME) nanocomposites, …
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Tuning Strong Correlated Properties in EuTiO3 Thin Films Grown by Pulsed Laser Deposition
… vertically alligned nanocomposite (VAN) thin films were carried out. We carried out investigations for finding a suitable binary oxide second phase to incoporate with ETO. It was challenging since the growth condition suitable for growing ETO would not always be compatible with that of …
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Stress Effects on Phase Morphological and Compositional Non-uniformity in Intercalation Compounds
… well-known Asaro-Tiller-Grinfeld instability in epitaxial thin film growth. Predictions of the analysis is corroborated by phase-field simulations, which further reveals the phase morphology evolution at the late stage of interface instability development. Because this phenomenon leads to …
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Heteroepitaxial Germanium-on-Silicon Thin-Films for Electronic and Photovoltaic Applications
… and Ge “virtual” substrate on Si. The all-epitaxial molecular beam epitaxy (MBE)-grown thin (<1 μm) hybrid GaAs/Ge “virtual” buffer approach provided 1J GaAs cell efficiency of ~10% on Si, as compared with cell structures with thick 3 μm GaAs buffers. Solar cell results were further …
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Atomic structure and defects of III-V compound semiconductor strained-layer-superlattices for infrared detection
… of various wavelengths. The advances in epitaxial thin-film growth techniques, such as molecular beam epitaxy (MBE) or metal organic chemical vapor deposition (MOCVD), have brought dramatic reductions in structural defects, such as misfit dislocations, that are strong carrier scatters and …
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Magnon and phonon thermal transport in oxides
… To solve these problems, one of the important thing that we need to understand is the thermal transport that happens inside the material. In my PhD work, I advanced the understanding of the mechanism of magnon and phonon thermal transport in oxides. In these studies, I use ultrafast pump-probe …
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Magnetoelectric Oxide Nanocomposite Heterostructures
… (ME) effect. Recently, with the development of thin film growth techniques, the multiferroics magnetoelectric composite heterostructures exhibit a very promising future prospects. This dissertation focused on the design, fabrication and characterization of new multiferroics magnetoelectric …