A small Maglev car model using YBCO bulk superconductors

Flux pinning in Al doped TSMG YBCO bulk superconductors

The superconducting properties of Y1Ba2(Cu1−x Alx)3O7/Y2BaCuO5 bulk superconductors with different Al contents were studied (x = 0.0025–0.05). A peak effect was observed at intermediate magnetic fields over a wide temperature range below Tc. The influence of standard oxygenation (SO) at 400 ◦C and high pressure oxygenation (HPO) at 750 ◦C on the critical current density Jc was investigated. We ...

Assessing the spatial and field dependence of the critical current density in YBCO bulk superconductors by scanning Hall probes

Although the flux density map of a bulk superconductor provides in principle sufficient information for calculating the magnitude and the direction of the supercurrent flow, the inversion of the Biot–Savart law is ill conditioned for thick samples, thus rendering this method unsuitable for state of the art bulk superconductors. If a thin (<1 mm) slab is cut from the bulk, the inversion is reaso...

Oxygen determination from cell dimensions in YBCO superconductors

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...

YBCO Blazes the Trail for High-Temperature Superconductors

The influence of post-growth thermal treatments on the critical current density of TSMG YBCO bulk superconductors

Oxygenation and thermochemical post-growth treatments of top seeded melt-growth (TSMG) YBCO bulk superconductors can significantly influence critical current density. It is shown that, depending on oxygenation conditions and the size of 211 particles, different reductions of intrinsic critical current density values can be obtained due to the reduction in the sample cross-section caused by the ...