We have performed detailed structuraland superconducting studies of YBCO single layers, YBCO/PrBCO/YBCO tn-layers, and YBCØ/PrBCO superlattices.The results for single layers indicate that a nominally one unit cell thick YBCO film sandwiched between ~rBCO layers is not superconducting. However, a superlattice with nominally one unit cell thick YBCO layers has a measurabte superconducting tempera...

A series of fruitful results were achieved in the course of our study on the fabrication of superconductor YBCO single domain by Powder Melting Process (PMP). First, by the high temperature Faraday Balance, we revealed the dynamic phase transition in the growth of YBCO single domain in PMP process, which is an original research work in this field. The clear phase transition results build a fund...

The preparation of La0.4Sr0.6TiO3 (LSTO) buffer layer and YBa2Cu3O7−δ (YBCO) superconducting thick film by a low cost technology was studied. The crystal orientation of LSTO and YBCO films was detected by X-ray diffraction, the conductivity of LSTO film and superconductivity of YBCO coating were investigated by standard four-probe method. Excellent in-plane alignment, smooth and dense LSTO buff...

Films of YBa2Cu3O7-x (YBCO) with c-axis orientation were directly deposited on nontextured silver substrates by inclined substrate pulsed laser ablation. The structure of the YBCO films was characterized by X-ray diffraction 2θ-scans, Ωscans, and pole-figure analysis. A good alignment of the c-axis of the YBCO films was confirmed by the Ω-scans, in which the full width at half maximum of the YB...

We refine a technique used by B. Boyce to change the carrier concentration level of thin YBa2Cu3O7-δ (YBCO) films. The purpose of this is to eventually study the superconductor to insulator transition that takes place in YBCO as carrier concentration level decreases. Introduction. For high carrier densities, YBCO is a d-wave superconductor, and its superfluid density has either a linear or a qu...

A custom-designed semifluorinated phosphonic acid, (9,9,10,10,11,11,12,12,13,13,14,14,15,15,16,16,16-heptadecafluorohexadecyl)phosphonic acid (F8H8PA), and a normal hexadecylphosphonic acid (H16PA) were synthesized and used to generate self-assembled monolayers (SAMs) on commercially available yttrium barium copper oxide (YBCO) tapes. In this study, we wished to evaluate the effectiveness of th...

The effects of YBa2Cu3O72d ~YBCO! cap layers on the magnetic and electronic properties of La0.7Sr0.3MnO3 ~LSMO! underlayers was determined by x-ray magnetic circular dichroism and x-ray absorption spectroscopy techniques. The YBCO caps alter the LSMO in a way that effectively decreases the concentration of La at the LSMO/YBCO interface. © 2000 American Institute of Physics. @S0021-8979~00!62908-0#

in this work we simulated the representative volume element (rve) of carbon nanotube (cnt) which is surrounded by high temperature superconductor (ybco) by using ansys finite element software. first we considered perfect model (for ybco and cnt) and investigated the effect of radius, length, and the number of nanotube in young’s modulus of the ybco by applying force on rve. then, a third region...