The in-plane normal-state resistivity of Zn-doped YBa2Cu3O7−δ and heavily underdoped pure YBCO single crystals is measured down to low temperatures under magnetic fields up to 18 T. We found that the temperature dependence of the normal-state ρab does not obey log(1/T ) and tends not to diverge in the low temperature limit. The result suggests that the “ground state” of the normal state of YBCO...

Abstract We report the preparation and characterization of YBa 2 Cu 3 O 7 (YBCO) films grown onto SrTiO YSZ substrates by trifluoroacetates chemical solution deposition method following sintering with oxygen atmosphere at 860 °C. The X-ray diffraction (XRD) reveals (00ℓ) – oriented crystallites indicating epitaxial growth in c -direction. Despite granular morphology presence Y BaCuO 5 CuO as mi...

The application of magnetic fields to layered cuprates suppresses their high-temperature superconducting behaviour and reveals competing ground states. In widely studied underdoped YBa2Cu3O6+x (YBCO), the microscopic nature of field-induced electronic and structural changes at low temperatures remains unclear. Here we report an X-ray study of the high-field charge density wave (CDW) in YBCO. Fo...

The crystal angle dependence of magnetization has been measured in spherically shaped, single-domain YBa2Cu3Ox ~YBCO!. The single-domain sample is processed by a seeded-melt growth process in which a small NdBa2Cu3Ox seed is used to induce domain growth through a peritectic reaction in YBCO. It has been found that the angle dependence of magnetization can be obtained in a series of zero-field-c...

A small pancake coil was wound using 1.2m long, 10 mm wide YBCO coated superconductor tape with impregnation by epoxy resin. The coil was immersed in liquid nitrogen and tested in several regimes. In the DC regime, we measured the I-V curve, the hysteresis of the magnetic field-current curve at liquid nitrogen temperature and the radial component of the coil field at the coil edges. The critica...

We measured forces applied by an actuator with a YBa2Cu3O7 (YBCO) film at near 77 K for the Large-scale Cryogenic Gravitational-wave Telescope (LCGT) project. An actuator consisting of both a YBCO film of 1.6 μm thickness and 0.81 cm area and a solenoid coil exerted a force of up to 0.2 mN on a test mass. The presented actuator system can be used to displace the mirror of LCGT for fringe lock o...

A rapid and simple procedure for the determination of non-stoichiometric oxygen in YBa2Cu3O7 d (YBCO) superconductors is described, based on the relationship between oxygen content and c-axis parameter of the YBCO structure. To test the proposed method the oxygen content of samples sinterised starting from different precursors has been calculated from X-ray powder diffraction analysis and compa...

The spontaneous flux generation and magnetic field modulation of the critical current in a 0−π Josephson junction are calculated for different ratios of the junction length L to the Josephsen penetration depth λJ , and different ratios of the 0-junction length to the π-junction length. These calculations apply to a Pb-YBCO c-axis oriented junction with one YBCO twin boundary, as well as other e...