186 LLE Review, Volume 95 Introduction High-temperature superconductors (HTS’s) exhibit many properties that are very desirable for microwave-based telecommunication applications. Their main advantages are low absorption at microwave frequencies1 and existence of HTS microwave devices based on the controlled vortex flux flow.2 The mostpromising material is the YBa2Cu3O7–x (YBCO) superconductor ...

Magnetization and 63Cu NMR-NQR relaxation measurements are used to study the superconducting fluctuations in YBa2Cu3O6+x (YBCO) oriented powders. In optimally doped YBCO the fluctuating negative magnetization Mfl(H,T ) is rather well described by an anisotropic Ginzburg-Landau (GL) functional and the curves Mfl/ √ H cross at Tc. In underdoped YBCO, instead, over a wide temperature range an anom...

A low-cost chemical solution deposition technique was employed to prepare YBa2Cu3O7-delta (YBCO) nanocomposite films starting from a colloidal containing preformed ZrO2 nanocrystals. As previous publications revealed, an increase in the amount of nanocrystals results progressive deterioration film properties. The parameters that control this process and their interplay are still unknown detail....

Solid-state synthesis from powder precursors is the primary processing route to advanced multicomponent ceramic materials. Designing routes usually a laborious, trial-and-error process, as heterogeneous mixtures of often evolve through complicated series reaction intermediates. Here, we show that phase evolution multiple can be modeled sequence pairwise interfacial reactions, with thermodynamic...

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...