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 21 for “"Ferroelectric material"”.
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Electrical characterization of ferroelectric capacitors for non-volatile memory applications
Ferroelectric materials show a spontaneous electrical polarization that can be reversed in sense by an applied external electric field. It should, therefore, be feasible to build a ferroelectric memory device that can store information in digital form. Ascertaining the suitability of a …
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Dielectric noise spectroscopy of relaxor ferroelectrics
… one simple question: are the dynamics of relaxor ferroelectrics cooperative? To accomplish this task, we have developed a promising new technique that is excellent at sorting out the internal dynamics of high dielectric materials. Specifically we have examined the dynamics of the relaxor …
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Ferroelectric doped hafnium oxide and its application on electronic devices
Ferroelectricity is the material property such that we can induce spontaneous polarization, reverse it and modulate it by varying the applied electrical field on the ferroelectric material. Recently, doped hafnium oxide (HfO2) has garnered attention with its excellent scalability, reliability, and …
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A Micromechanics Study on Ferroelectrics and Multiferroic Composites
… composites are studied in this thesis. One is ferroelectric materials, and the other is the multiferroic composites. Based upon the essential properties of these two types materials, several issues need to be considered in order to study their effective properties. For example, the …
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Silicon on Ferroelectric Insulator Field Effect Transistor (SOFFET): A Radical Alternative to Overcome the Thermionic Limit
… to conduct a broad research to find alternative materials and new architectures to the current technology for the MOSFET devices. Beyond silicon electronic materials like group III-V heterostructure, ferroelectric material, carbon nanotubes (CNTs), and other nanowire-based designs are in …
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Integration of Ferroelectric Materials into High Density Non-Volatile Random Access Memories
The characteristic polarization response of a ferroelectric material to an applied electric field enables a binary state device in the form of a thin film ferroelectric capacitor that can be used to store digital information. In a high density memory the capacitor is placed on the top of a …
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UNCOVERING FUNDAMENTAL PHYSICS OF ENERGY MATERIALS WITH QUANTUM MECHANICS, MOLECULAR DYNAMICS, AND APPLIED MACHINE LEARNING
… it is to improve electronics and catalysts with materials science and engineering. Experimental techniques alone are not sufficient to reliably and consistently improve modern devices; theoretical modeling is required to establish structure-property relationships in materials to understand how …
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Development of a ferroelectric plasma source through material degradation studies and characterization of volume and surface discharges
… particle emitter is partially limited by the materials used. A particular case of this is a ferroelectric plasma source (FPS) or ferroelectric electron emitter (FEE), in which a strongly polarizable material, capable of generating large surface currents (10^0 – 10^5 A/cm2), is pulsed to emit …
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The modification of graphene band structure by periodic potential perturbation
… engineered periodic potential patterns. Ferroelectrics is widely applied in everyday technologies, such as non-volatile memories and medical imaging, due to the presence of spontaneous polarisation in the material and that being reversible by an externally applied electric field. A …
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Coupling of the electrical, mechanical and optical response in polymer/liquid-crystal composites
… along an external electric field. When a ferroelectric material is used as host polymer, the electric field generated by the piezoelectric effect can orient the director of the LC under an applied mechanical stress, making these materials interesting candidates for piezo-optical devices. …
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Study of the Valence Tautomer Complex [Co(sq)(cat)(3-tpp)2] for Applications in Molecular Spintronics
Molecular materials exhibiting bistability between two states are intriguing candidates for next generation electronic devices. Two similar classes of materials, known as spin crossover (SCO) and valence tautomers (VT) respectively, are of particular interest due to their multifunctional …
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Investigating anharmonic effects in condensed matter systems
… nuclear motion on the properties of solid materials from first principles. Such anharmonic effects can be significant in many cases. A vibrational self-consistent field (VSCF) method is used as the basis for these calculations, which is then improved and applied to a variety of solid state …
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Pulse Sharpening Effects of Thin Film Ferroelectric Transmission Lines
<p>Advances in material science have resulted in the development of electrically nonlinear high dielectric thin film ferroelectrics, which have led to new opportunities for the creation of novel devices. This dissertation investigated one such device: a low voltage nonlinear transmission line …
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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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Synthesis, Characterization and Applications of Europium Based Perovskite Oxide Nanoparticles
… been studied widely over the past years. These materials possess unique physical, chemical, magnetic and dielectric properties which make them potential candidates for a wide range of applications such as electronics, energy storage and photocatalysis. There are a number of synthesis methods for …
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Electro-thermal nanoprobes for nanometrology and nanofabrication
… instrument for studying and manipulating material at nanometer length scales. Localized control of temperature and electric potential with an AFM microcantilever facilitates metrology and fabrication with nanometer precision and relatively low cost. Current self-heating AFM …
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In-situ plasmon-enhanced characterization of optically accessible ultra-thin film ferroelectric devices
… for optoelectronic analysis of ultra-thin film ferroelectric (FE) devices, which overcome the drawbacks of contemporary investigation methods such as their destructive nature, lack of precision, or in certain techniques the requirement for a vacuum environment. We show the use of a innovative …
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Reliability and processing of ferroelectric thin film capacitors with emphasis on fatigue and etching
Ferroelectric materials are characterized by a reversible spontaneous polarization in the absence of an electric field. The characteristic polarization response of a ferroelectric material to an applied electric field enables a binary state device in the form of a thin film ferroelectric capacitor …
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Engineering of Alkali Metalorganic Precursors: Synthesis to Mechanistic Aspects
Alkali metal (Li, Na, and K) containing materials have become the holy grail for sustainable energy materials and green functional devices. As a means to transition towards more sustainable technologies, there has been an increase in developing new materials that do not contain harmful, toxic, or …
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