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Epitaxial Growth And Characterization Of Cobalt Doped Zinc Oxide And Cobalt Doped Titanium Dioxide For Spintronic Applications
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Book Synopsis Epitaxial Growth and Characterization of Cobalt-doped Zinc Oxide and Cobalt-doped Titanium Dioxide for Spintronic Applications by : Allan C. Tuan
Download or read book Epitaxial Growth and Characterization of Cobalt-doped Zinc Oxide and Cobalt-doped Titanium Dioxide for Spintronic Applications written by Allan C. Tuan and published by . This book was released on 2003 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Growth and Characterization of Cobalt-doped BaFe2As2 Epitaxial Thin Films and Superlattices by :
Download or read book Growth and Characterization of Cobalt-doped BaFe2As2 Epitaxial Thin Films and Superlattices written by and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The synthesis of high quality single crystal thin films and multilayers of pnictide superconductors is critical to explore their intrinsic properties and evaluate novel device applications. In this study, we have grown genuine epitaxial thin films of Co-doped BaFe2As2 (Ba-122) by employing template engineering. The epitaxial thin films on single-crystal (001) SrTiO3 template on (001) LSAT substrates exhibit high transition temperature (Tc, zero resistivity of 21.5K), superior critical current density (Jc) of 4.5 MA/cm2 (4.2K, self field) and strong c-axis flux pinning. We have also studied grain boundary (GB) characteristics of epitaxial Co-doped Ba-122 thin films on SrTiO3 bicrystal substrates. Despite their low anisotropy (Hc2(ab)/Hc2(c)
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2003 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 2002 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optical Characterization of Doped Zinc Oxide Nanowires by : Faezeh Mohammadbeigi
Download or read book Optical Characterization of Doped Zinc Oxide Nanowires written by Faezeh Mohammadbeigi and published by . This book was released on 2017 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: ZnO is a promising semiconductor material with a direct band gap energy of 3.3 eV which makes it a good candidate for UV and visible range light emitting devices. Metalorganic chemical vapour epitaxy (MOVPE) provides the possibility of industrial scale growth of ZnO, with very fine control of impurity dopants. Despite the vast recent literature on ZnO, there are very few studies of systematic intentional doping. ZnO nanowires (NWs) can be grown easily on various substrates with high crystalline quality and low defect densities and tend to exhibit reduced substrate induced strain. This enables us to perform careful spectroscopic analysis of impurity related optical transitions and identify the physical nature of various dopant species. A detailed study of low temperature photoluminescence (PL) transitions in doped ZnO NWs, thin films, and bulk crystals grown by MOVPE and chemical vapour transport (CVT) methods is presented. The standard group III donors were first investigated. Donor bound exciton (D0X) transitions previously assigned to Ga, Al, and In were confirmed in intentionally doped samples. Group IV dopants such as carbon, and tin are interesting since they can act in principle as double donors or double acceptors. We report four new shallow D0X transitions (Z-lines), at 3360.8 (Z1), 3361.2 (Z2), 3361.7 (Z3) and 3361.9 (Z4) meV, which can be greatly enhanced by co-doping with carbon tetrachloride and hydrogen. These shallow donors appear to be due to carbon impurities complexed with other unknown defects in four distinct configurations. Carbon-doped samples also exhibit two distinct acceptors with binding energies of 133 ± 5 and 181 ± 5 meV. Doping concentration and temperature dependent PL studies of unintentionally doped and Sn-doped ZnO single crystals confirmed emission from the I10 D0X transition which was recently proven to contain Sn on a Zn site. Sb-doped ZnO NWs were grown in an attempt to produce p-type material as reported by some groups. Our PL studies including Magneto PL, have shown that rather than p-doped material, the addition of small amounts of Sb-dopant resulted in a new PL transition at 3364.3 meV, which turns out to be the shallowest D0X transition so far observed in ZnO.
Book Synopsis Cobalt Doped Titanium Dioxide, a Possible Candidate for Dilute Magnetic Semiconductor by : Abdul K. Rumaiz
Download or read book Cobalt Doped Titanium Dioxide, a Possible Candidate for Dilute Magnetic Semiconductor written by Abdul K. Rumaiz and published by ProQuest. This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cobalt-doped Zinc Oxide Thin Films as Model Fischer-Tropsch Nano-catalysts Grown by Pulsed Electron Beam Ablation by : Asghar Ali
Download or read book Cobalt-doped Zinc Oxide Thin Films as Model Fischer-Tropsch Nano-catalysts Grown by Pulsed Electron Beam Ablation written by Asghar Ali and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis MOVPE Growth and Characterization of ZnSe Based Materials for Short-wavelength Multiple Quantum Well Optical Modulator Applications by : Kevin Xunde Bao
Download or read book MOVPE Growth and Characterization of ZnSe Based Materials for Short-wavelength Multiple Quantum Well Optical Modulator Applications written by Kevin Xunde Bao and published by . This book was released on 2000 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fabrication and Characterization of Cobalt-Pigmented Anodized Zinc for Photocatalytic Application by : Judith Chebwogen
Download or read book Fabrication and Characterization of Cobalt-Pigmented Anodized Zinc for Photocatalytic Application written by Judith Chebwogen and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Population growth and urbanization have led to water scarcity and pollution, which is a health hazard not only to humans but also to the ecosystem in general. This has necessitated coming up with ways of treating water before consumption. Photocatalysis has proved to be one of the most promising cheap techniques that involve chemical utilization of solar energy. TiO2 widely used in photocatalysis absorbs a narrow range of the solar spectrum compared to ZnO. In this regard, this study aimed at preparing and optimizing cobalt-pigmented ZnO, which is applicable in photocatalytic water treatment. The objectives in this study were to fabricate zinc oxide (ZnO) thin films by anodization, pigment the fabricated films with varying cobalt concentrations, characterize the fabricated films optically, and investigate the cobalt-pigmented ZnO,Äôs performance in the methylene blue degradation under UV light irradiation. Mirror-polished zinc plates were sonicated in ethanol and rinsed. Anodization was done at room temperature in 0.5¬†M oxalic acid at a constant voltage of 10¬†V for 60¬†min, and cobalt electrodeposited in the films. Post-deposition treatment was done at 250¬∞C. Optical properties of the films were studied using a UV-VIS- NIR spectrophotometer in the solar range of 300,Äì2500¬†nm. The photocatalytic activity of the fabricated films was studied in methylene blue solution degradation in the presence of UV light irradiation for 5¬†h. Cobalt pigmenting was observed to reduce reflectance and optical band gap from 3.34 to 3.10¬†eV indicating good photocatalytic properties. In this study, ZnO film pigmented with cobalt for 20 s was found to be the most photocatalytic with a rate constant of 0.0317¬†h,àí1 and hence had the optimum cobalt concentration for photocatalytic water treatment. This can be applied in small-scale water purification.
Book Synopsis Epitaxial Growth and Characterization of Zn(Mg)O Thin Films by : Thomas Andreas Wassner
Download or read book Epitaxial Growth and Characterization of Zn(Mg)O Thin Films written by Thomas Andreas Wassner and published by . This book was released on 2012 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cobalt Doped ZnO And CuO Nanomaterials For Photovoltaic Applications by : Amrit Kaphle
Download or read book Cobalt Doped ZnO And CuO Nanomaterials For Photovoltaic Applications written by Amrit Kaphle and published by . This book was released on 2019 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Epitaxial Growth of Complex Metal Oxides by : Gertjan Koster
Download or read book Epitaxial Growth of Complex Metal Oxides written by Gertjan Koster and published by Woodhead Publishing. This book was released on 2022-04-22 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: Epitaxial Growth of Complex Metal Oxides, Second Edition reviews techniques and recent developments in the fabrication quality of complex metal oxides, which are facilitating advances in electronic, magnetic and optical applications. Sections review the key techniques involved in the epitaxial growth of complex metal oxides and explore the effects of strain and stoichiometry on crystal structure and related properties in thin film oxides. Finally, the book concludes by discussing selected examples of important applications of complex metal oxide thin films, including optoelectronics, batteries, spintronics and neuromorphic applications. This new edition has been fully updated, with brand new chapters on topics such as atomic layer deposition, interfaces, STEM-EELs, and the epitaxial growth of multiferroics, ferroelectrics and nanocomposites. Examines the techniques used in epitaxial thin film growth for complex oxides, including atomic layer deposition, sputtering techniques, molecular beam epitaxy, and chemical solution deposition techniques Reviews materials design strategies and materials property analysis methods, including the impacts of defects, strain, interfaces and stoichiometry Describes key applications of epitaxially grown metal oxides, including optoelectronics, batteries, spintronics and neuromorphic applications
Book Synopsis DEFECTS AND FERROMAGNETISM IN TRANSITION METAL DOPED ZINC OXIDE by : Sunil Thapa
Download or read book DEFECTS AND FERROMAGNETISM IN TRANSITION METAL DOPED ZINC OXIDE written by Sunil Thapa and published by . This book was released on 2016 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transition metal doped zinc oxide has been studied recently due to its potential application in spintronic devices. The magnetic semiconductor, often called Diluted Magnetic Semiconductors (DMS), has the ability to incorporate both charge and spin into a single formalism. Despite a large number of studies on ferromagnetism in ZnO based DMS and the realization of its room temperature ferromagnetism, there is still a debate about the origin of the ferromagnetism. In this work, the synthesis and characterization of transition metal doped zinc oxide have been carried out. The sol-gel method was used to synthesize thin films, and they were subsequently annealed in air. Characterization of doped zinc oxide films was carried out using the UV-visible range spectrometer, scanning electron microscopy, superconducting quantum interference device (SQUID), x-ray diffraction(XRD) and positron annihilation spectroscopy. Hysteresis loops were obtained for copper and manganese doped zinc oxide, but a reversed hysteresis loop was observed for 2% Al 3% Co doped zinc oxide. The reversed hysteresis loop has been explained using a two-layer model.
Book Synopsis Ferromagnetism in Cobalt-doped Titanium Dioxide by : Alexandre Francois Lussier
Download or read book Ferromagnetism in Cobalt-doped Titanium Dioxide written by Alexandre Francois Lussier and published by . This book was released on 2005 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis And Characterization Of Doped ZnO Nanomaterials Potential Application In Third Generation Solar Cells by : Echo D. Adcock Smith
Download or read book Synthesis And Characterization Of Doped ZnO Nanomaterials Potential Application In Third Generation Solar Cells written by Echo D. Adcock Smith and published by . This book was released on 2017 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fabrication and Characterization Studies of Co-doped Zinc Oxides by : 陳柏烜
Download or read book Fabrication and Characterization Studies of Co-doped Zinc Oxides written by 陳柏烜 and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Magnetic Circular Dichroism and Hall Measurement of Cobalt-doped Zinc Oxide Thin Films by : Yuanyuan Deng
Download or read book Magnetic Circular Dichroism and Hall Measurement of Cobalt-doped Zinc Oxide Thin Films written by Yuanyuan Deng and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
