Large current-capacity high-temperature superconducting (HTS) conductors using YBCO wires are being considered as an option for the fusion energy reactor FFHR [1, 2]. Typical required current for such conductors in FFHR is 100 kA at about 13 T magnetic field. The operating temperature for HTS magnets in FFHR is about 20 K with conduction cooling using an indirect cooling method. Since the speci...

We point out that both superexchange between CuO2 layers, and interlayer tunneling, derive from frustrated one-particle hopping between layers, and that they should be treated on an equal footing. Doing so, we arrive at a new view of the nature of pairing in the cuprate supercondcutors, which explains the striking even ↔ odd selection rule observed by Keimer in neutron scattering by YBCO.

In this paper I calculate the possible alteration of the gravitational field in a superconductor by using the time-dependent Ginzburg-Landau equations (TDGL). I compare the behaviour of a high-Tc superconductor (HTCS) like YBa2Cu3O7 (YBCO) with a classical low-Tc superconductor (LTCS) like Pb. Finally, I discuss what values of the parameters characterizing a superconductor can enhance the reduc...

Superconductingg thickk films (200µm ~300µm) of YBCO have been fabricated successfully on MgO substrates by a new approach. The precursor powders (YBa 2 Cu 3 O 7-δ (Y123) + 0.1molY 2 BaCuO 5 (Y211)) are placedd between two MgO (10mm×10mm)slicesto formsandwichstructure.TheYBCOthickk films have been obtainedd from the precursors by modifiedd melt growth process. Resistance measurementsofYBCOthick...

The discovery of high-temperature superconductors (HTS) and associated expectations of application of these materials in ultrafast electronics and optoelectronics has created an urgent need for a better understanding of carrier dynamics in HTS, including the HTS electrical and optical properties and their response to pulsed, external electromagnetic perturbations. The above goals were accomplis...

High-temperature superconducting films can be used for fabricating the cutting-edge high-temperature microwave devices because of their low surface resistances. However, resistances materials are particularly sensitive to microstructure due special two-dimensional mechanisms and extremely short coherence lengths. To investigate correlations between resistance materials, YBa<sub>2</sub&...

Magnetotransport measurements were carried out for YBa 2 Cu 3 O 7-x (YBCO) thin films in external perpendicular magnetic fields of H. The studies performed both the virgin samples and irradiated ones. Xenon ions used as an irradiation. Thus we studied features broadening superconducting transition YBCO (virgin irradiated). drop was analyzed depending on field H, well irradiation dose n D . When...

Terahertz imaging has attracted significant interest for its applications in noninvasive medical diagnosis, security systems, and industrial inspections. Superconducting bolometers are one of the promising technologies ultra-sensitive terahertz detection. Here, we present THz images captured by a low-cost superconducting transition-edge detector. The sensing element detector is meander line pat...

We review thermodynamic 4 variables and potentials, recommend precision optics interference. Measurement techniques for the phase transitions as follows. consider superconductivity a Lambda (close to 2nd order) transition phenomena. Then quantum mechanics entanglement of two branches superconductor wires that are made YBCO 123 high temperature can be further increased one wire toward room while...