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Book X ray Studies of the Fabrication and Characterization of Bulk and Fiber Forms of the High Temperature Superconductor YBa2Cu3O subscript X

Download or read book X ray Studies of the Fabrication and Characterization of Bulk and Fiber Forms of the High Temperature Superconductor YBa2Cu3O subscript X written by Michael A. Carter and published by . This book was released on 1989 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Crystal Growth And Characterization of the Model High Temperature Superconductor HgBa2CuO sub 4 delta

Download or read book Crystal Growth And Characterization of the Model High Temperature Superconductor HgBa2CuO sub 4 delta written by and published by . This book was released on 2007 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the discovery of high-transition-temperature (T{sub c}) superconductivity in La{sub 2-x}Ba(subscript x)CuO4 in 1986, the study of the lamellar copper oxides has remained at the forefront of condensed matter physics. Apart from their unusually high values of T{sub c}, these materials also exhibit a variety of complex phenomena and phases. This rich behavior is a consequence of the lamellar crystal structures, formed of copper-oxygen sheets separated by charge reservoir layers, and of the strong electron-electron correlations in the copper-oxygen sheets. After two decades of intensive research, which has stimulated many valuable new insights into correlated electron systems in general, there remains a lack of consensus regarding the correct theory for high-T{sub c} superconductivity. The ultimate technological goal of room-temperature superconductivity might only be attained after the development of a deeper understanding of the mercury-based compounds HgBa2Ca{sub n-1}Cu{sub n}OI{sub 2n+2+{delta}}, which currently exhibit the highest T{sub c}values. One very important issue in this regard is the role of electronic versus chemical and structural inhomogeneities in these materials, and the associated need to separate material-specific properties from those that are essential to superconductivity. Unfortunately, there has been remarkably little scientific work on the mercury-based compounds because sizable crystals have not been available; quantitative measurements of any kind would be invaluable benchmarks for testing the theories of high-T{sub c} superconductivity. The compounds HgBa2Ca{sub n-1}Cu{sub n}OI{sub 2n+2+{delta}} can be viewed as model systems not only because of their record high-T{sub c} values, but also because of their high-symmetry crystal structures. Of particular interest is the simplest member of this materials family, HgBa2CuO{sub 4+{delta}} (Hg1201), which possesses only one copper-oxygen sheet per unit cell (n = 1), as shown schematically in Figure 1a. The largest crystals obtained by previous growth methods do not exceed 1 mm3, and hence are insufficient in size for detailed studies by many experimental techniques. Here we report a novel recipe for the growth of Hg1201 crystals as well as detailed sample characterization results, including initial inelastic magnetic neutron scattering data. We note that samples grown by the method described here have already enabled recent optical conductivity, inelastic X-ray scattering, and angle-resolved photoemission studies.

Book Studies of High Temperature Superconductors

Download or read book Studies of High Temperature Superconductors written by A. V. Narlikar and published by Nova Science Publishers. This book was released on 1990 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: CONTENTS: Weak Coupling Theory of High Temperature Superconductors; Investigations of a Few Novel Series of Thallium Cuprate Superconductors Showing Possible Change in the Sign of Charge Carriers with Composition; Some Structural & Chemical Aspects of the Bi-Pb-Sr-Ca-Cu-O System; High Magnetic Field Studies of High Temperature Superconductors; Fabrication of Bi-Sr-Ca-Cu Oxide Superconductors with Controlled Numbers of Cu-0 Layers; Characterization of High Temperature Superconductors by High Excitation Spectroscopies; Mossbauer Spectroscopy of High Temperature Superconductors; RVB & Related Theories of HTSC; Fabrication of 107k Superconducting Films & Their Normal State Transport Properties; Ion Beam Analysis of High T Superconductors; Thermal Conductivity of High Temperature Superconductor; A New Theoretical Approach to Electron Pairing And Uperconductivity in High T Superconductors; High Resolution Polarized X-Ray Absorption Spectroscopy: Symmetry of the Hole States in High-T Superconductors; Phase Diagrams in the Y-Ba-Cu-O System & Crystal Growth of Ybco Superconductors; Index.

Book Synthesis and Characterization of High temperature Superconductors

Download or read book Synthesis and Characterization of High temperature Superconductors written by John J. Pouch and published by . This book was released on 1993 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection of papers describes the synthesis, properties, characteristics and applications of the recently discovered high-temperature superconductors. Results of research activities around the world are presented.

Book X ray Characterization of Materials

Download or read book X ray Characterization of Materials written by Eric Lifshin and published by Wiley-VCH. This book was released on 1999-08-11 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: Linking of materials properties with microstructures is a fundamental theme in materials science, for which a detailed knowledge of the modern characterization techniques is essential. Since modern materials such as high-temperature alloys, engineering thermoplastics and multilayer semiconductor films have many elemental constituents distributed in more than one phase, characterization is essential to the systematic development of such new materials and understanding how they behave in practical applications. X-ray techniques play a major role in providing information on the elemental composition and crystal and grain structures of all types of materials. The challenge to the materials characterization expert is to understand how specific instruments and analytical techniques can provide detailed information about what makes each material unique. The challenge to the materials scientist, chemist, or engineer is to know what information is needed to fully characterize each material and how to use this information to explain its behavior, develop new and improved properties, reduce costs, or ensure compliance with regulatory requirements. This comprehensive handbook presents all the necessary background to understand the applications of X-ray analysis to materials characterization with particular attention to the modern approach to these methods.

Book Analysis of Yttrium Barium Copper Oxide by X Ray Diffraction and Mechanical Characterization

Download or read book Analysis of Yttrium Barium Copper Oxide by X Ray Diffraction and Mechanical Characterization written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-10-24 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The efforts in developing high-temperature superconductor (HTSC) YBa2Cu3O7 electrical leads are to benefit future NASA missions that will carry payloads with sensitive instruments operating at cryogenic temperatures. Present-day leads made of copper or magnesium are responsible for as much as 50 percent of the parasitic heat load on cryogenic systems. A reduction of this load could be achieved by replacing the conventional materials with HTSC ceramic electrical leads. Superconductor quality has become a concern in the industry, as has the development of effective evaluation methods. The factors that need to be examined for these materials include material purity, mechanical properties, and superconducting ability below the critical temperature. We applied several methods to study these factors: thermogravimetric analysis, x-ray diffraction, tensile testing, and laser-generated ultrasound. Our objectives were to determine the average tensile strength and Young's modulus of the HTSC material and to compare them to those values for copper and manganin. Arsenovic, Petar Goddard Space Flight Center

Book Composite Materials

Download or read book Composite Materials written by Krishan K. Chawla and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on the relationship between structure and properties, this is a well-balanced treatment of the mechanics and the materials science of composites, while not neglecting the importance of processing. This updated second edition contains new chapters on fatigue and creep of composites, and describes in detail how the various reinforcements, the materials in which they are embedded, and of the interfaces between them, control the properties of the composite materials at both the micro- and macro-levels. Extensive use is made of micrographs and line drawings, and examples of practical applications in various fields are given throughout the book, together with extensive references to the literature. Intended for use in graduate and upper-division undergraduate courses, this book will also prove a useful reference for practising engineers and researchers in industry and academia.

Book Nondestructive X ray Scattering Characterization of High Temperature Superconducting Wires

Download or read book Nondestructive X ray Scattering Characterization of High Temperature Superconducting Wires written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this CRADA was to characterize the structural properties of the superconductor material within the wires in order to determine which processing procedures produce the best superconductor texture and phase development, and hence the best ultimate current carrying capacity.

Book Resonant Elastic and Inelastic X ray Scattering Studies of Orders and Excitations in Cuprate High temperature Superconductors

Download or read book Resonant Elastic and Inelastic X ray Scattering Studies of Orders and Excitations in Cuprate High temperature Superconductors written by Min Gu Kang (S.M.) and published by . This book was released on 2020 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: After 30 years of extensive scrutiny from their discovery in 1986, copper oxide high-temperature superconductors remain one of the most enigmatic and captivating platforms for emergent many-body phases in condensed matter physics. Understanding the emergent physics of collective electronic orders and excitations across the cuprate phase diagram is a key to decode the puzzle of high-temperature superconductivity and how it arises from the strongly correlated Mott state. With the advance of soft X-ray instrumentations during the last decade, resonant elastic and inelastic X-ray scattering (REXS and RIXS) have rapidly established as highly sensitive and versatile probes of electronic orders and excitations in quantum materials. Using REXS at the Cu-L3 resonance, we investigated the evolution of momentum-space topology of charge correlation in electron-doped cuprates T'-(Nd,Pr)2CuO4[subscript delta] as a function of carrier doping. We revealed that, upon doping the parent Mott insulator, charge correlations first emerge in the form of rotationally-symmetric spatial density modulations, which evolve to more conventional long-ranged checkerboard order at higher doping levels. Our charge susceptibility calculations uncover a close link between the topology of charge correlations and the underlying fermiology in electron-doped cuprates and also suggest that the nature of charge correlations changes from locally incoherent charge ripples to a long-ranged broken symmetry state upon carrier doping. Using RIXS, we developed an experimental method to disentangle various electronic excitations in cuprates based on their nature. Our approach is built on the tensorial nature of the RIXS scattering matrix, whose form is imprinted onto the angular dependence of RIXS signal. Applying this method to prototypical magnetically-ordered and superconducting cuprates T'-(Nd,Pr)2CuO4[subscript -][subscript delta] and YBa2Cu3O6.75, we resolved the charge, spin, and orbital character of elastic scattering, (para-)magnon/bimagnon modes, and higher-energy intraband orbital excitations.

Book Synthesis and Characterization of the High temperature Superconductors La2 subscript X Sr subscript X Cu1 subscript Y Fe subscript Y O4

Download or read book Synthesis and Characterization of the High temperature Superconductors La2 subscript X Sr subscript X Cu1 subscript Y Fe subscript Y O4 written by Sang-Ho Kim and published by . This book was released on 1990 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book X ray Studies of Microstructures in Semiconductors and Superconducting Materials

Download or read book X ray Studies of Microstructures in Semiconductors and Superconducting Materials written by and published by . This book was released on 1991 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several different experimental investigations were carried out during the present report period. These include x-ray studies of semiconductors, high-{Tc} superconductors, and various thin films using synchrotron radiation (especially soft x-ray experiments by means of our new detector) and measurements of some fundamental properties of new superconducting materials made in our laboratory at Buffalo. We have made the first systematic study of electronic structure in the high-{Tc} superconductors La{sub 2-x}Sr(subscript x)CuO4 with x ranging from 0 to 0.15 by x-ray absorption spectroscopy (XAS).

Book The New Superconducting Electronics

Download or read book The New Superconducting Electronics written by H. Weinstock and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is based on the proceedings of the NATO-sponsored Advanced Studies Institute (ASn on The New Superconducting Electronics (held 9-20 August 1992 in Waterville Valley, New Hampshire USA). The contents herein are intended to provide an update to an earlier volume on the same subject (based on a NATO ASI held in 1988). Four years seems a relatively short time interval, and our title itself, featuring The New Superconducting Electronics, may appear somewhat pretentious. Nevertheless, we feel strongly that the ASI fostered a timely reexamination of the technical progress and application potential of this rapid-paced field. There are, indeed, many new avenues for technological innovation which were not envisioned or considered possible four years ago. The greatest advances by far have occurred with regard to oxide superconductors, the so-called high transition-temperature superconductors, known in short as HTS. These advances are mainly in the ability to fabricate both (1) high-quality, relatively large-area films for microwave filters and (2) multilayer device structures, principally superconducting-normal-superconducting (SNS) Josephson junctions, for superconducting-quantum-interference-device (SQUID) magnetometers. Additionally, we have seen the invention and development of the flux-flow transistor, a planar three-terminal device. During the earlier ASI only the very first HTS films with adequate critical-current density had just been fabricated, and these were of limited area and had high resistance for microwave current.