Sökning: "High-Tc superconductor"

Visar resultat 1 - 5 av 11 avhandlingar innehållade orden High-Tc superconductor.

  1. 1. Vortex fluctuations in superconductors

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Peter Olsson; Umeå universitet.; [1992]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Superconductor; Two dimensions; vortex; coulomb gas; XY model; Kosterlitz-Thouless transition; high-Tc.;

    Sammanfattning : The vortex fluctuations have proved to be responsible for the onset of dissipation in thin type-II superconducting Aims. There is also growing evidence that dissipation in high- temperature superconductors exhibits the same kind of two-dimensional (2D) behavior. LÄS MER

  2. 2. Local structure in disordered materials studied by neutron scattering and RMC modelling

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Liselotte Karlsson; Uppsala universitet.; [1999]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nuclear physics; Local structure; neutron scattering; RMC modelling; metallic glasses; high Tc; superconductors; fast ion conductors; Kärnfysik; NATURAL SCIENCES Physics Nuclear physics; NATURVETENSKAP Fysik Kärnfysik; Physics Of Matter; materiefysik;

    Sammanfattning : Different disordered materials are becoming more and more important in various technological applications. There is a need to improve our detailed understanding of the local structure of such materials and how the atomic structure is related to macroscopic physical properties. LÄS MER

  3. 3. The isostatic pressure processing of high Tc superconductors and their properties

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :John Niska; [1993]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering Materials; Materialteknik;

    Sammanfattning : The high Tc superconductors are highly anisotropic, ceramic materials which makes it difficult to sinter them at atmospheric pressure to full density. High porosity is detrimental to their mechanical and electrical properties, so the use of isostatic pressures was used to give higher density materials with improved properties. LÄS MER

  4. 4. Electron Spectroscopy Studies of Cuprate and Bismuthate Superconductors

    Detta är en avhandling från Synchrotron Radiation Research

    Författare :Mats Qvarford; [1996]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; metal overlayer; electronic structure; resonant photoemission; X-ray absorption; photoemission; high-Tc superconductor; electron correlation; Physics; Fysik; Fysicumarkivet A:1996:Qvarford;

    Sammanfattning : The electronic structure of the cuprate superconductors Bi(2)Sr(2)CaCu(2)O(8) and Bi(2)Sr(2)CuO(6) and the bismuthate superconductor Ba(0.6)K(0.4)BiO(3), as well as semiconducting Ba(0.9)K(0. LÄS MER

  5. 5. Vacuum Ultraviolet Scanning Photoelectron Microscopy, Instrumentation & Applications

    Detta är en avhandling från Synchrotron Radiation Research

    Författare :Ulf Johansson; Lunds universitet.; Lund University.; [1997]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Photoelectron Microscopy; Spectromicroscopy; Photoemission; Silicon; Oxide desorption; High-Tc superconductor; Physics; Ellipsoidal mirror; Fysik; Chemistry; Kemi; Fysicumarkivet A:1997:Johansson;

    Sammanfattning : This thesis describes the design and characterisation of a vacuum ultraviolet scanning photoelectron microscope as well as results from studies of laterally inhomogeneous surfaces. The instrument utilises synchrotron radiation from an undulator at the 550 MeV storage ring at the MAX-laboratory. LÄS MER