In superconducting coil applications, magnetic fields are applied to material from various directions. YBa2Cu3Oy (YBCO) coated conductor containing BaHO3 (BHO) flux pinning centers is expected be used as application. this study, BHO-doped YBCO films were prepared by changing the substrate temperature (Ts) and thickness per pulse (tpulse) using pulsed laser deposition method. As a result, isotro...

We report on the laser-induced permanent changes of the critical current (Ic) and normal resistance (Rn) of YBa2Cu3O72x ~YBCO! step-edge Josephson junctions. The 2to 20-mm-wide junctions were prepared from a 200-nm-thick YBCO film deposited by a pulsed KrF excimer laser onto 300-nm-high steps etched in the LaAlO3 substrate. The laser modification experiments were performed by illuminating the j...

The role of grains and grain boundaries in producing reversible strain effects on the transport current critical current density (Jc) of YBa2Cu3O7−δ (YBCO) coated conductors that are produced with metal–organic deposition (MOD) was investigated. The strain (ε) dependence of Jc for full-width coated conductors is compared with that for samples in which the current transport was limited to a few ...

Abstract We investigated the integration of transient liquid-assisted growth (TLAG) approach for epitaxial YBa 2 Cu 3 O 7− x (YBCO) films by physical deposition methodologies (pulsed laser (PLD)), as an additional opportunity high-throughput YBCO. As a prerequisite, highly flat and amorphous YBCO precursor were deposited PLD at temperatures below 400 °C on single-crystalline SrTiO (STO) LaMnO (...

Abstract We report a novel doping strategy for YBa2Cu3O7-x (YBCO) superconducting films by using positive mismatch, Ba2YNbO6 (BYNO), and negative LaAlO3 (LAO), simultaneously. Double can significantly reduce the c-strain in YBCO film canceling strain between two dopants. By systematically optimizing amount of both BYNO LAO, it was found that LAO do not act equally. The microstructure distributi...

We have developed a single-direction melt growth method in which REBCO melt-textured bulks grow only vertically from seed plate utilizing the difference peritectic temperatures of REBCO. Entirely c-grown YBCO, DyBCO and GdBCO with various sizes shapes were successfully fabricated high reproducibility. Disk-shaped showed trapped fields almost concentric field distributions, reflecting homogeneou...

We have developed high-?;. SQUIDs based on Josephson step-edge junctions on silicon substrates. The SQUIDs show a transfer function up to 150 pVIQ,, and a white noise of lV5 @JHz" at 50 K. During the last three years extensive investigations of the growth of YBCO, buffer and passivation layers as well as step-preparation and patterning processes were necessary to find a standard preparation pro...

Recent developments in high-temperature superconductivity highlight a generic tendency of the cuprates to develop competing electronic (charge) supermodulations. While coupled with the lattice and showing different characteristics in different materials, these supermodulations themselves are generally conceived to be quasi-two-dimensional, residing mainly in individual CuO2 planes, and poorly c...

Using the Bogoliubov-de Gennes equation, we study the quasi-particle spectra around a single vortex in a d-wave superconductor, where a magnetic field is parallel to the c-axis. In the temperature region where the Ginzburg-Landau theory is valid, we find that the local density of states preserves a circular symmetry when the symmetry of the superconducting order parameter is pure d-wave. It, ho...

We have studied the transport current distributions in striated YBa2Cu3O7 x (YBCO) films and coated conductors using variable temperature scanning laser microscopy (VTSLM). VTSLM images reveal the location of incomplete separation between filaments due to un-optimized sample processing parameters. When the current flows parallel to the completely separated striations, the current seems to flow ...