The interplay between the quasi 1-dimensional CuO-chains and the 2-dimensional CuO2 planes of YBa(2)Cu(3)O(6+x) (YBCO) has been in focus for a long time. Although the CuO-chains are known to be important as charge reservoirs that enable superconductivity for a range of oxygen doping levels in YBCO, the understanding of the dynamics of its temperature-driven metal-superconductor transition (MST)...

Chemical deposition methods like MOD and MOCVD are promising approaches for coated conductors (CCs) due to their reduced cost and easy scaling. High quality La2Zr2O7 (LZO) buffer layers were prepared by MOD on Ni-5%at.W (NiW) RABiTS and subsequent YBCO layers (450 to 800 nm thick) were deposited by pulsed injection MOCVD, leading to a simple low cost architecture NiWRABiTS/LZOMOD/YBCOMOCVD. In ...

This paper presents RF power properties of YBCO films on LaAlO3 substrate examined using microstrip disk shape-patterned resonators for around 4 GHz. Characterization of the YBCO films for the resonators was carried out. For input-output power measurement, the resonators with the condition of strong I/O couplings were designed and fabricated. The RF power properties of the resonators at cryogen...

Improved via connections i n structures of YBa,Cu,07.,/SrTi0,/YBa,Cu,0,, (YBCO /STO/ YBCO) multilayers have been made using a combined HF wet-etching and ion-mil l ing process. The critical current density Jc of the via is as high as 2 x l o 6 A/cm2 at 76 K, and i s dominated by edge contacts in the ab-plane. YBCO and Sr,AlNbO, (SAN) multilayer test circuits were also made with this process. Th...

Although the solution deposition of YBa2Cu3O7-x (YBCO) superconducting films is cost effective and capable of large-scale production, further improvements in their superconductivity are necessary. In this study, a deep UV (DUV) irradiation technique combined with a low-fluorine solution process was developed to prepare YBCO films. An acrylic acidic group as the chelating agent was used in the p...

A heterojunction has been fabricated by growing a YBa2Cu3O7− YBCO film of the thickness of 1000 Å on a 0.5 wt %Nb-doped SrTiO3 STON crystal, and its resistive behavior was experimentally studied. The strong asymmetry of the current-voltage I–V relation with respect to bias polarity indicates an excellent rectifying property of the junction in the whole temperature range studied. The superconduc...

A macroscopic symmetry group describing the superconducting state of an orthorhombically twinned crystal of YBCO is introduced. This macroscopic symmetry group is different for different symmetries of twin boundaries. Josephson tunneling experiments performed on twinned crystals of YBCO determine this macroscopic symmetry group and hence determine the twin boundary symmetry (but do not experime...

This paper presents experimental and analytical results of trapped field characteristics of a stack of square YBCO thin film plates for compact NMR magnets. Each YBCO plate, , has a 25-mm diameter hole at its center. A total of 500 stacked plates were used to build a 40-mm long magnet. Its trapped field, in a bath of liquid nitrogen, was measured for spatial field distribution and temporal stab...

Polarization-dependent X-ray absorption spectra (XAS) on the O 1s edge has been measured on a highly in-plane aligned (1 0 0) a-axis YBa2Cu3O7 d (YBCO) thin films. The in-plane XAS, that is, the electric field E of the linearly polarized synchrotron light parallels to bor c-axes of YBCO films (Ekb or Ekc), were obtained in a normal-incidence alignment. Furthermore, the XAS for Eka was calculate...