Search for dissertations about: "YBCO"

Showing result 11 - 15 of 38 swedish dissertations containing the word YBCO.

  2. 11. Dynamics of high-angle grain boundary YBCO Josephson junctions

    Author : Tobias Lindström; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : This thesis describes experimental investigations of properties of high-angle YBa2Cu3O7−δ(YBCO)bicrystal Josephson junctions and SQUIDs fabricated on SrTiO3-substrates. The main focus of theinvestigation has been on the effects of the predominant d-wave symmetry of the superconductingwavefunction in YBCO on transport properties and dynamics. READ MORE

  4. 12. YBCO nanowires to study nanoscale ordering in High-Tc Superconductors

    Author : Riccardo Arpaia; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; nanoscale ordering; nanoSQUIDs; nanowires; High-Tc superconductors; ultrathin films; oxygen doping; nanowire-based single photon detectors;

    Abstract : We present the realization of YBa2Cu3O7-δ (YBCO) nanowires for both basic physics studies, which could help to elucidate the microscopic mechanisms of High critical Temperature Superconductors (HTS), and for novel applications.The first part of the thesis describes an improved nanopatterning procedure, based on e-beam lithography in combination with an amorphous carbon mask and a very gentle Ar+ ion etching. READ MORE

  5. 13. Resistive studies of vortices and fluctuations in single crystal YBa2Cu3O7-

    Author : Therese Björnängen; KTH; []
    Keywords : condensed matter physics; high temperature superconductors; YB2Cu3O7-d; untwinned YBCO; oxygen deficiency; superconducting fluctuations; magnetoconductivity; in-plane anisotropy; vortex liquid; vortex solid; vortex correlation;

    Abstract : High-temperature superconductors have been intensely studiedsince the discovery, almost 20 years ago. Their layeredstructure, extreme type-II behavior, large anisotropy, andstrong fluctuations have led to a large number of new andinteresting problems. READ MORE

  6. 14. YBCO nanowires for ultrasensitive magnetic flux detectors and optical applications

    Author : Riccardo Arpaia; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : .... READ MORE

  7. 15. Experimental Studies of the Vortex Solid-to-Liquid Transition and Disorder in High-Temperature Superconductors

    Author : Björn Lundqvist; KTH; []
    Keywords : high-temperature superconductors; vortex dynamics; vortex solid-to-liquid transition; B c; B ab; anisotropy; YBCO single crystals; oxygen deficiency; Tl-2212; Tl-2201; charge neutral doping; disorder effects;

    Abstract : .... READ MORE