A Study of Epitaxial YBa2Cu3O7-8 Thin Films with a Well-defined Orientation and Related Topics

A Study of Epitaxial YBa2Cu3O7-8 Thin Films with a Well-defined Orientation and Related Topics PDF Author: Tsz-lo Cheng
Publisher:
ISBN:
Category : Epitaxy
Languages : en
Pages : 144

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A Study of Epitaxial YBa2Cu3O7-8 Thin Films with a Well-defined Orientation and Related Topics

A Study of Epitaxial YBa2Cu3O7-8 Thin Films with a Well-defined Orientation and Related Topics PDF Author: Tsz-lo Cheng
Publisher:
ISBN:
Category : Epitaxy
Languages : en
Pages : 144

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A Study of Epitaxial Yba2cu3o7-8 Thin Films with a Well-Defined Orientation and Related Topics

A Study of Epitaxial Yba2cu3o7-8 Thin Films with a Well-Defined Orientation and Related Topics PDF Author: 鄭子路
Publisher: Open Dissertation Press
ISBN: 9781374736771
Category :
Languages : en
Pages :

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This dissertation, "A Study of Epitaxial YBa2Cu3O7-8 Thin Films With a Well-defined Orientation and Related Topics" by 鄭子路, Tsz-lo, Cheng, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b3121296 Subjects: Thin films Epitaxy

Study of Epitaxial Thin Films of Yba2cu3o7-[Delta] on Silicon with Different Buffer Layers

Study of Epitaxial Thin Films of Yba2cu3o7-[Delta] on Silicon with Different Buffer Layers PDF Author: Engang Fu
Publisher: Open Dissertation Press
ISBN: 9781374667174
Category :
Languages : en
Pages :

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This dissertation, "Study of Epitaxial Thin Films of YBa2Cu3O7-[delta] on Silicon With Different Buffer Layers" by Engang, Fu, 付恩剛, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled STUDY OF EPITAXIAL THIN FILMS OF YBa Cu O ON 2 3 7-δ SILICON WITH DIFFERENT BUFFER LAYERS submitted by Fu Engang for the degree of Master of Philosophy at The University of Hong Kong in August 2005 Silicon is the most widely used semiconductor in the microelectronic industry. Highly epitaxial thin films of YBa Cu O (YBCO) grown on Si wafers are of 2 3 7-δ special interest for development of superconductor/semiconductor hybrid microelectronic devices and circuits. However, severe interaction between Si and YBCO layer, large mismatch in their lattice constant, and strain due to different thermal expansion often degrade the crystallinity and superconductivity of the grown YBCO layers. In this study, yttria-stabilized zirconia (YSZ) and Eu CuO (ECO) 2 4 were introduced as double buffer layers to improve the growth and properties of the YBCO thin films grown on silicon. Preparation and characterization of epitaxial YBCO/ECO/YSZ/Si multilayer structures were studied. YBCO thin films and the double buffer layers of ECO/YSZ were deposited on the silicon (100) substrate by the pulsed laser deposition (PLD) method. Firstly, the YSZ thin layer was grown epitaxially on silicon (100) substrate to separate YBCO from the Si substrate. Effects of substrate temperature and operating gas pressure on the structure and surface roughness of YSZ thin film were examined and the optimum deposition parameters were determined based on experimental results and comprehensive analysis. X-Ray diffraction (XRD) patterns and rocking curve revealed an epitaxial growth with a perfect c-axis orientation. The YSZ thin films grown on silicon substrate have smooth surface, providing a base on which ECO and YBCO thin film can be grown epitaxially. To further improve the quality of YBCO films, an additional layer of ECO with very stable 214-T' crystal structure was inserted between YBCO and YSZ/Si. The influence of substrate temperature and oxygen gas pressure on the properties of ECO thin films grown on YSZ/Si were experimentally analyzed and the growth conditions were optimized. Finally, the epitaxial YBCO thin films were grown on silicon substrate with double buffer layers of ECO/YSZ. The influences of substrate temperature, oxygen gas pressure and different buffer layers on the properties of YBCO thin films were studied. It was found that the crystal structure, surface roughness and superconductivity of YBCO films could be significantly improved by adding such a double buffer of ECO/YSZ. The quality of the YBCO thin films has been significantly enhanced when compared with that grown on Si with a single YSZ buffer layer and with double buffer layers of Nd CuO (NCO)/YSZ. Such highly 2 4 epitaxial thin films of YBCO grown on silicon should be of great interest for various applications including high-frequency elements, millimeter-wave receivers, and superconducting quantum interference devices. DOI: 10.5353/th_b3637488 Subjects: Thin films Silicon Epitaxy

Study of Epitaxial Thin Films of YBa2Cu3O7-[delta] on Silicon with Different Buffer Layers

Study of Epitaxial Thin Films of YBa2Cu3O7-[delta] on Silicon with Different Buffer Layers PDF Author: Engang Fu
Publisher:
ISBN:
Category : Epitaxy
Languages : en
Pages : 16

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Electron Microscopy and Analysis 1997, Proceedings of the Institute of Physics Electron Microscopy and Analysis Group Conference, University of Cambridge, 2-5 September 1997

Electron Microscopy and Analysis 1997, Proceedings of the Institute of Physics Electron Microscopy and Analysis Group Conference, University of Cambridge, 2-5 September 1997 PDF Author: Rodenburg
Publisher: CRC Press
ISBN: 9780750304412
Category : Technology & Engineering
Languages : en
Pages : 716

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Book Description
Electron Microscopy and Analysis 1997 celebrates the centenary anniversary of the discovery of the electron by J.J. Thomson in Cambridge and the fiftieth anniversary of this distinguished Institute group. The book includes papers on the early history of electron microscopy (from P. Hawkes), the development of the scanning electron microscope at Cambridge (from K. Smith), electron energy loss spectroscopy (from L.M. Brown), imaging methods (from J. Spence), and the future of electron microscopy (from C. Humphreys). Covering a wide range of applications of advanced techniques, it discusses electron imaging, electron energy-loss and x-ray analysis, and scanning probe and electron beam microscopies. This volume is a handy reference for professionals using microscopes in all areas of physics, materials science, metallurgy, and surface science to gain an overview of developments in our understanding of materials microstructure and of advances in microscope interrogation techniques.

Proceedings of the International Conference on Materials and Mechanisms of Superconductivity, High Temperature Superconductors IV

Proceedings of the International Conference on Materials and Mechanisms of Superconductivity, High Temperature Superconductors IV PDF Author:
Publisher:
ISBN:
Category : High temperatures
Languages : en
Pages : 866

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Energy Research Abstracts

Energy Research Abstracts PDF Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 754

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Advances in Superconductivity IV

Advances in Superconductivity IV PDF Author: Hisao Hayakawa
Publisher: Springer Science & Business Media
ISBN: 4431681957
Category : Science
Languages : en
Pages : 1086

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Book Description
Five years have passed since the breakthrough in the critical temperature for superconductors. During this period, many superconducting materials have been discovered and developed, and our knowledge of the physical and other properties of oxide superconductors has deepened through extensive and intensive research. This knowledge has advanced superconductivity science and technology from the initial questioning stage to a more developed but still uncertain second stage where research activity in superconductivity now overlaps with fields of application. Generally speaking, science resonates with technology. Science not only complements but also competes with or stimulates technology. New scientific knowledge has triggered the second technological research stage. Much progress has been made in the development of practical devices, encouraging the application of superconductors in areas such as human levitation, a high speed levitated bearing, large current transforming leads, and high frequency devices. This technological progress has increased our understanding of the science involved, such as flux pinning and dynamics, and anomalous long-range superconducting interactions. At this important stage, international cooperation and collaborative projects can effectively sustain aggressive research and development in order to advance superconductivity to the next stages. The ISS Symposium is expected to serve as a venue for increasing our knowledge of superconductivity and for exchanging visions for future research and applications, through the presentation and discus of the latest research results. These proceedings also aim to summarize sion annual progress in high-Tc superconductivity in all fields.

Electron Microscopy and Analysis 1997, Proceedings of the Institute of Physics Electron Microscopy and Analysis Group Conference, University of Cambridge, 2-5 September 1997

Electron Microscopy and Analysis 1997, Proceedings of the Institute of Physics Electron Microscopy and Analysis Group Conference, University of Cambridge, 2-5 September 1997 PDF Author: John M. Rodenburg
Publisher: CRC Press
ISBN: 1000112306
Category : Science
Languages : en
Pages : 708

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Book Description
Electron Microscopy and Analysis 1997 celebrates the centenary anniversary of the discovery of the electron by J.J. Thomson in Cambridge and the fiftieth anniversary of this distinguished Institute group. The book includes papers on the early history of electron microscopy (from P. Hawkes), the development of the scanning electron microscope at Cambridge (from K. Smith), electron energy loss spectroscopy (from L.M. Brown), imaging methods (from J. Spence), and the future of electron microscopy (from C. Humphreys). Covering a wide range of applications of advanced techniques, it discusses electron imaging, electron energy-loss and x-ray analysis, and scanning probe and electron beam microscopies. This volume is a handy reference for professionals using microscopes in all areas of physics, materials science, metallurgy, and surface science to gain an overview of developments in our understanding of materials microstructure and of advances in microscope interrogation techniques.

Mechanisms of Heteropitaxial Growth: Volume 263

Mechanisms of Heteropitaxial Growth: Volume 263 PDF Author: Matthew F. Chisholm
Publisher: Mrs Proceedings
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 536

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Book Description
The MRS Symposium Proceeding series is an internationally recognised reference suitable for researchers and practitioners.