Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 33 for “"Ferroelectric thin films"”.
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Photovoltaic Properties of Ferroelectric Thin Films
This project seeks to evaluate ferroelectric thin film materials in term of their photovoltaic properties. The ferroelectric thin films with strong photovoltaic effects are deposited on silicon substrate; hence it opens a new window for integration towards opto-electronic application. The effects …
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Tunable microwave filters using ferroelectric thin films
… devices based on Barium Strontium Titanate (BST) thin films have gained a lot of interest in recent years. The frequency agility of the ferroelectric devices is based on the external DC electric field controlled permittivity of BST thin film. In this research work, several tunable microwave …
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Integration of ferroelectric thin films into silicon based microsystems
The integration of ferroelectric materials will enhance the functionality of conventional microsystems. The converse piezoelectric effect can be used for the fabrication of integrated actuators, which will help to realize integrated high frequency switches. The aim of this thesis is the integration …
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Dielectric and pyroelectric susceptibilities of epitaxial ferroelectric thin films
The dielectric and pyroelectric properties of ferroelectrics have been utilized extensively in a variety of applications such as memories, transducers, and sensors. Traditionally, such applications have utilized bulk or single crystal versions of ferroelectrics but modern electronic devices …
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Ferroelectric Thin Films for High Density Non-volatile Memories
Ferroelectric random access memories (FRAM) are considered as future memories due to high speed, low cost, low power, excellent radiation hardness, nonvolatility, and good compatibility with the existing integrated circuit (IC) technology. The non-volatile FRAM devices are divided into two …
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Piezoelectric, Dielectric and Ferroelectric Thin Films on Metal Substrates for Microelectronic Applications
… of integrating piezoelectric, dielectric and ferroelectric- lead and barium based oxide thin films and PVDF polymer on flexible metal substrates for microelectronic applications. Investigations on the key processing parameters and properties relationship for lead zirconate titanate (PZT, …
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Preparation and Characterization of Ferroelectric Thin Films for Tunable and Pyroelectric Applications
Ferroelectric thin films have been extensively studied for their wide applications in pyroelectric detectors and tunable devices. In the present work, pulsed laser deposition (PLD) technique has been employed to deposit ferroelectric Ba(Ti0.85Sn0.15)O3 (BTS) thin films and heterostructures. BTS …
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Competition and Coexistence of Screening Mechanisms in Ferroelectric Thin Films and Superlattices
… mechanisms that screen the depolarising field in ferroelectric materials, namely domains and two-dimensional electron gases. A more realistic electrostatic description of thin films, which accounts for the presence of a substrate has been derived. The electrostatic description of superlattices of …
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New modalities for strain engineering of lead-free perovskite ferroelectric thin films
… has been given to the development of lead-based ferroelectric systems such as PbZr1-xTixO3 due to their robust high temperature ferroelectric properties, as well as the presence of the so-called morphotropic phase boundary (MPB) ̶ a temperature-independent composition-driven structural …
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Optical property studies and metalorganic chemical vapor deposition of ferroelectric thin films
Ferroelectric lead zirconate titanate thin films, Pb(ZrxTi 1-x)0 3 or PZT, have aroused considerable interest in recent years for the application in nonvolatile electronic memories because of their excellent ferroelectric properties. In this research, PZT thin films were studied from two aspects: …
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Orientation dependence of dielectric susceptibilities and switching characteristics in epitaxial ferroelectric thin films
… an important role in determining the response of ferroelectrics to applied stimuli. While contributions to ferroelectric properties from the intrinsic response of the polarization within a domain and so-called extrinsic contributions from the motion of domain walls have been studied, the …
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Processing - structure - property interrelationships of ferroelectric thin films with emphasis on formation kinetics
Lead zirconate titanate (PZT) is a ferroelectric material which has many interesting properties. Recently, PZT thin films have been considered as one of the most promising materials for the application of nonvolatile electronic memories. In this study, a sol-gel process for PZT film preparation was …
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An investigation into controlling the growth modes of ferroelectric thin films using pulsed laser deposition and RHEED
Thin film ferroelectricss are widely considered for tunable microwave applications, the reduced small dimensions leading to low tuning voltages. The incipient ferroelectric strontium titanate is an ideal solution for tunable microwave devices, particularly in conjunction with high temperature …
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New pyroelectric phenomena from graded ferroelectric barium strontium titanate thin films
… we explored the potential application of graded ferroelectric thin films in uncooled pyroelectric detectors. We built a magnetron sputter system, and developed a method of deposited compositional graded ferroelectric thin films using rf magnetron sputtering, a silicon compatible thin film …
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Two phase magnetoelectric epitaxial composite thin films
… interaction between the piezoelectricity of the ferroelectric phase and the magnetostriction of the ferromagnetic phase, said multiferroic composites are capable of producing relatively large ME coefficients. This Dissertation focused on the deposition and characterization of two-phase composite …
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