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Structural And Electrical Properties Of Biaxially Textured Yba2cu3osub 7 X Thin Films On Buffered Ni Based Alloy Substrates
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Book Synopsis Structural and Electrical Properties of Biaxially Textured YBa[sub 2]Cu[sub 3]O[sub 7-x] Thin Films on Buffered Ni-based Alloy Substrates by :
Download or read book Structural and Electrical Properties of Biaxially Textured YBa[sub 2]Cu[sub 3]O[sub 7-x] Thin Films on Buffered Ni-based Alloy Substrates written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxide high-T[sub c] superconducting wires and tapes with high critical current density (J[sub c]) are essential in future electrical power applications. Recently, YBa[sub 2]Cu[sub 3]O[sub 7[minus]x] (YBCO) thin films grown on Ni-based alloy tapes have attracted intense interest because of their promise for these applications. In order to achieve high J[sub c], buffer layers are necessary for fabricating biaxially aligned YBCO thin films. In our studies, yttria-stabilized zirconia (YSZ) layers were deposited on Ni-based alloy substrate by ion-beam assisted deposition, and CeO[sub 2] buffer layers were subsequently deposited on the YSZ layer by pulsed laser deposition (PLD) or electron beam evaporation. In addition, MgO layers were deposited on Ni-based alloy substrates by inclined substrate deposition. Finally, biaxially textured YBCO thin films were deposited on these buffered metallic substrates by PLD under optimized conditions. The orientation and in-plane textures of YBCO and the buffer layers were characterized by X-ray diffraction[Theta]/2[Theta] scan, [phi]-scan, and pole figure analysis. The superconductive transition features were examined by measuring inductive T[sub c] and transport J[sub c].
Book Synopsis Structural and Electrical Properties of Biaxially Textured YBa2Cu3O{sub 7-x} Thin Films on Buffered Ni-based Alloy Substrates by :
Download or read book Structural and Electrical Properties of Biaxially Textured YBa2Cu3O{sub 7-x} Thin Films on Buffered Ni-based Alloy Substrates written by and published by . This book was released on 2000 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxide high-T{sub c} superconducting wires and tapes with high critical current density (J{sub c}) are essential in future electrical power applications. Recently, YBa2Cu3O{sub 7-x} (YBCO) thin films grown on Ni-based alloy tapes have attracted intense interest because of their promise for these applications. In order to achieve high J{sub c}, buffer layers are necessary for fabricating biaxially aligned YBCO thin films. In our studies, yttria-stabilized zirconia (YSZ) layers were deposited on Ni-based alloy substrate by ion-beam assisted deposition, and CeO2 buffer layers were subsequently deposited on the YSZ layer by pulsed laser deposition (PLD) or electron beam evaporation. In addition, MgO layers were deposited on Ni-based alloy substrates by inclined substrate deposition. Finally, biaxially textured YBCO thin films were deposited on these buffered metallic substrates by PLD under optimized conditions. The orientation and in-plane textures of YBCO and the buffer layers were characterized by X-ray diffraction [Theta]/2[Theta] scan, [phi]-scan, and pole figure analysis. The superconductive transition features were examined by measuring inductive T{sub c} and transport J{sub c}.
Book Synopsis Preparation of High Quality YBa2Cu3O{sub 7-{delta}} Thick Films on Flexible Ni-based Alloy Substrates with Textured Buffer Layers by :
Download or read book Preparation of High Quality YBa2Cu3O{sub 7-{delta}} Thick Films on Flexible Ni-based Alloy Substrates with Textured Buffer Layers written by and published by . This book was released on 1995 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: High current YBa2Cu3O{sub 7-{delta}} (YBCO) thick films on flexible nickel substrates with textured buffer layers were deposited by using ion beam assisted deposition (IBAD). Pulsed laser deposited YBCO films were not only c-axis oriented with respect to the film surface but also strongly in-plane textured. The in-plane mosaic spread of YBCO films was (approximately) 10°. A critical current density of 8x105 A/cm2 was obtained at 75 K and zero field for thin YBCO films. It was also demonstrated that thick YBCO films with a high critical current and excellent magnetic field dependence at liquid nitrogen temperature can be obtained on flexible nickel substrates by using the textured buffer layers. Issues encountered in producing the films were discussed.
Book Synopsis The Structural and Electrical Properties of Electroless Nickel-boron Thin Films by : Polin Patty Tung Dubois
Download or read book The Structural and Electrical Properties of Electroless Nickel-boron Thin Films written by Polin Patty Tung Dubois and published by 1974 [c1975]. This book was released on 1974 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural, Electrical and Microwave Properties of (Bi,Pb)2Sr2Ca2Cu3O̳y Thin Films by : Andrew Edward Manzi
Download or read book Structural, Electrical and Microwave Properties of (Bi,Pb)2Sr2Ca2Cu3O̳y Thin Films written by Andrew Edward Manzi and published by . This book was released on 1996 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Preparation of High Quality YBa2Cusub 3Osub 7-delta Thick Films on Flexible Ni-based Alloy Substrates with Textured Buffer Layers by :
Download or read book Preparation of High Quality YBa2Cusub 3Osub 7-delta Thick Films on Flexible Ni-based Alloy Substrates with Textured Buffer Layers written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of Epitaxial Thin Films of Yba2cu3o7-[Delta] on Silicon with Different Buffer Layers by : Engang Fu
Download or read book Study of Epitaxial Thin Films of Yba2cu3o7-[Delta] on Silicon with Different Buffer Layers written by Engang Fu and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Book Synopsis Preparation of High Quality YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} Thick Films on Flexible Ni-based Alloy Substrates with Textured Buffer Layers by :
Download or read book Preparation of High Quality YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} Thick Films on Flexible Ni-based Alloy Substrates with Textured Buffer Layers written by and published by . This book was released on 1995 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: High current YBa2Cu3O{sub 7-?} (YBCO) thick films on flexible nickel substrates with textured buffer layers were deposited by using ion beam assisted deposition (IBAD). Pulsed laser deposited YBCO films were not only c-axis oriented with respect to the film surface but also strongly in-plane textured. The in-plane mosaic spread of YBCO films was - 10°. A critical current density of 8x105 A/cm2 was obtained at 75 K and zero field for thin YBCO films. It was also demonstrated that thick YBCO films with a high critical current and excellent magnetic field dependence at liquid nitrogen temperature can be obtained on flexible nickel substrates by using the textured buffer layers. Issues encountered in producing the films were discussed.
Book Synopsis Flux-pinning Related Defects in YBa2Cu3Osub 7-x Thin Films Grown on Miscut LaAlO3 (001) Substrates by :
Download or read book Flux-pinning Related Defects in YBa2Cu3Osub 7-x Thin Films Grown on Miscut LaAlO3 (001) Substrates written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Impact of Substrate on Structure and Electrical Properties in Pb-based Ferroelectric Thin Films by : Nagarajan Valanoor
Download or read book Impact of Substrate on Structure and Electrical Properties in Pb-based Ferroelectric Thin Films written by Nagarajan Valanoor and published by . This book was released on 2001 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electrical Properties of Amorphous BixGe1-x Alloy Thin Films by : Milton Anthony Meininger
Download or read book Electrical Properties of Amorphous BixGe1-x Alloy Thin Films written by Milton Anthony Meininger and published by . This book was released on 1974 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Epitaxial YBa[sub 2]Cu[sub 3]O[sub 7] Films on Rolled-textured Metals for High Temperature Superconducting Applications by :
Download or read book Epitaxial YBa[sub 2]Cu[sub 3]O[sub 7] Films on Rolled-textured Metals for High Temperature Superconducting Applications written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The epitaxial growth of high temperature superconducting (HTS) films on rolled-textured metal represents a viable approach for long-length superconducting tapes. Epitaxial, 0.5[micro]m thick YBa[sub 2]Cu[sub 3]O[sub 7] (YBCO) films with critical current densities, J[sub c], greater than 1 MA/cm[sup 2] have been realized on rolled-textured (001) Ni tapes with yttria-stabilized zirconia (YSZ)/CeO[sub 2] oxide buffer layers. This paper describes the synthesis using pulsed-laser deposition (PLD) of epitaxial oxide buffer layers on biaxially-textured metal that comprise the so-called rolling-assisted biaxially-textured substrates (RABiTs[trademark]). The properties of the buffer and YBa[sub 2]Cu[sub 3]O[sub 7] films on rolled-textured Ni are discussed, with emphasis given to the crystallographic and microstructural properties that determine the superconducting properties of these multilayer structures.
Book Synopsis Investigation of Growth, Structural and Electronic Properties of V_1tn2O_1tn3 Thin Films on Selected Substrates by : Alexei Nateprov
Download or read book Investigation of Growth, Structural and Electronic Properties of V_1tn2O_1tn3 Thin Films on Selected Substrates written by Alexei Nateprov and published by . This book was released on 2006 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Microstructures and Electrical Properties of SrRuO[sub 3] Thin Films on LaAlO[sub 3] Substrates by :
Download or read book Microstructures and Electrical Properties of SrRuO[sub 3] Thin Films on LaAlO[sub 3] Substrates written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Conductive SrRuO[sub 3] thin films have been deposited using pulsed laser deposition. Structure and microstructure of this system were studied using XRD, SEM, and scanning tunneling microscopy. Electrical properties of these films were measured. The film deposited at 250[degree]C is amorphous-like, showing semiconductor-like temperature dependence of electric conductivity. Film deposited at 425[degree]C is crystalline with very fine grain size (100 [approximately] 200[angstrom]), showing both metallic and semiconductor-like temperature dependence of the electrical conductivity. Film deposited at 775[degree]C shows reisistivity of 280 [mu][Omega][center-dot]cm at RT and resisdual resistivity ratio of 8.4. Optimized deposition conditions were determined. Possible engineering applications of SrRuO[sub 3] thin films are discussed. Bulk and surface electronic structures of SrRuO[sub 3] are calculated using a semi-empirical valence electron linear combination of atomic orbitals, and they are used to understand the electrical properties of the films.
Book Synopsis Synthesis of Novel Sr-based Cuprate Superconducting Thin Films, and the Relationship Between Their Crystal Structures and Electrical Properties by : Kuo-Wei Chang
Download or read book Synthesis of Novel Sr-based Cuprate Superconducting Thin Films, and the Relationship Between Their Crystal Structures and Electrical Properties written by Kuo-Wei Chang and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Phase pure, epitaxial infinite-layer compound (Sr1-xCa x)CuO2 thin films were deposited on SrTiO3(100) substrates. However, these films were always semiconducting with resistivities of the order of 1 ohm-cm and with carrier concentrations of 1017∼10 19cm-3, which is two to four orders of magnitude lower than the typical superconducting cuprates. The low carrier concentration was attributed to the absence of blocking layers containing a sufficient concentration of charged defects. Transport was via variable range hopping conduction.
Book Synopsis Structural and Electrical Properties of Diamond Thin Films by : Fimy Ruth Sivazlian
Download or read book Structural and Electrical Properties of Diamond Thin Films written by Fimy Ruth Sivazlian and published by . This book was released on 1994 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electrical, Optical and Structural Properties of Indium Tin Oxide Thin Films Deposited on Glass, Pet and Polycarbonate Substrates by Rf Sputtering by : Teck-Shiun Lim
Download or read book Electrical, Optical and Structural Properties of Indium Tin Oxide Thin Films Deposited on Glass, Pet and Polycarbonate Substrates by Rf Sputtering written by Teck-Shiun Lim and published by . This book was released on 199? with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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