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Showing 1 to 20 of 38 for “"strontium titanate"”.
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Recrystallisation Of Strontium Titanate
The recrystallisation rate of amorphous strontium titanate is dramatically enhanced by thermal annealing in water vapour as compared with a dry ambient. Time resolved optical reflectivity (TRR) has been combined with Rutherford backscattering spectrometry (RBS) and ion channelling to investigate …
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Development of Strontium Titanate Based Nanomaterials for Resistive Switching Applications
Recently, resistive switching devices have emerged as promising candidates for next generation non-volatile memory and neuromorphic computing applications. In general, resistive switching device consists of a two-terminal metal-insulator-metal structure, in which metal oxide is widely employed as …
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New pyroelectric phenomena from graded ferroelectric barium strontium titanate thin films
In this study 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 …
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Electronic and Plasmonic Properties of Nano-Sized Gold/Strontium Titanate Interface
In this thesis, nano-sized metal/oxide interfaces are fabricated to determine the size dependence of electronic and resistive switching properties, effect of atomic structure on the orientation dependence of electronic properties, and mechanisms of plasmon-induced current enhancement. A combination …
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Solid State Reactions Forming the (Lead, Strontium) (Titanate) (Zirconate) Solid Solution
Made available in DSpace on 2014-12-10T17:32:36Z (GMT). No. of bitstreams: 1 6808097.pdf: 2222649 bytes, checksum: 794a0d754cc8d9d51e9b5a3196765253 (MD5) Previous issue date: 1967
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Microstructure and Dielectric Behavior for Pure and Bismuth Doped Strontium-Titanate Polycrystalline Ceramics
Compositions in the system strontium-bismuth titanate are used in the dielectric ceramics industry where variability in properties has been attributed to the high vapor pressure of bismuth. The purpose of this investigation was to study the development of microstructure and properties obtained for …
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Characterization of Internal Boundary Layer Capacitors Based Upon Barium-Titanate and Strontium-Titanate
The properties of polycrystalline electrical ceramics are greatly influenced by the electrical and mechanical boundary conditions existing at grain and phase boundaries. The dielectric properties of internal boundary layer capacitor are directly related to their microstructure, in which …
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The impact of iron concentration on strontium titanate oxide materials as shown through ultrafast dynamics
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
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Hydrothermal Processing of Barium Strontium Titanate Composites on Printed Circuit Board for Thin Film Varactor Applications
… environment comprised of barium hydroxide, strontium hydroxide, and water, and is carried out at elevated temperature and pressure. This causes the amorphous BST sol to recrystallize, forming bridges that link the BST powders together, creating a dense network, leading to a higher dielectric …
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Atomistic modeling of mixed ion/electron conductors exhibiting configurational disorder: Application to iron-substituted strontium titanate
… electrons. A classic example is iron-substituted strontium titanate (SrTi1-xFexO3-d, STF) which is a promising cathode material in solid oxide fuel cells. The introduction of large degrees of elemental substitution is a material design strategy for tuning electrochemical characteristics of host …
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Effect of nonstoichiometry on the magnetism and ferroelectricity of Fe- and Co-substituted strontium titanate thin films
… Fe- (STF) and Co- (STC) substituted strontium titanate thin films are investigated for their microstructural, magnetic and ferroelectric properties. The films demonstrate room temperature ferromagnetism when grown under highly reducing conditions and in the case of STF, appear to …
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Effects Of Deposition Temperature And Post Deposition Annealing On The Electrical Properties Of Barium Strontium Titanate Thin Film For Embedded Capacitor Applications
… of sputter deposited ferroelectric Barium Strontium Titanate (Ba0.5St0.5) TiO3 thin film capacitors. Approximately 2000A of Barium Strontium Titanate (BST) thin film was deposited at different substrate temperatures (400,450,500 and 550[degrees]C) on cleaned silicon substrates. These BST …
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Pulsed Laser Deposition of Thin Film Heterostructures
<p> <p>Thin films of Strontium Ruthenate have been grown on Strontium Titanate and Lanthanum Aluminate (100) substrates by pulsed laser deposition. X-ray diffraction results show that the films grown on the Strontium Titanate are amorphous and polycrystalline on the Lanthanum Aluminate. Resistances …
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An investigation into controlling the growth modes of ferroelectric thin films using pulsed laser deposition and RHEED
… low tuning voltages. The incipient ferroelectric strontium titanate is an ideal solution for tunable microwave devices, particularly in conjunction with high temperature superconductors. It has no spontaneous polarisation yet possesses a large permittivity at low temperatures that is sensitive to …
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Template Directed Growth of Nb doped SrTiO₃ using Pulsed Laser Deposition
… conductivities. For example, niobium doped strontium titanate (SrNbxTi<sub>1-x</sub>O₃ or simply Nb:STO) has a power factor comparable to that of bismuth telluride. Semiconductor nanostructures have demonstrated a decrease in thermal conductivity (κ) resulting in an increase in the …
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Hydrothermal conversion of diatom frustules into barium titanate based replicas
… containing barium hydroxide to form barium titanate and barium strontium titanate replicas. The effects of reaction temperature, time, and solution composition on extent of conversion were examined. The conventional method of converting titanium dioxide to barium titanate, using a convection …
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M13 bacteriophage-enabled assembly of nanocomposites : synthesis and application in energy conversion devices
… perovskite ternary metal oxide materials (strontium titanate and bismuth ferrite) are synthesized and demonstrated for photocatalytic and photovoltaic properties.
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Tunable microwave filters using ferroelectric thin films
Frequency agile microwave 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 …
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