YBa2Cu307 crystals fabricated by a quench and melt growth process contain fine Y2BaCuO5 particles. These fine precipitates are considered to have three beneficial effects: they suppress crack formation; they promote oxygen diffusion; and they act as pinning centres. Such crystals exhibit larger flux
Flux creep and critical currents in epitaxial high Tc films
✍ Scribed by R. Griessen; J.G. Lensink; T.A.M. Schröder; B. Dam
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 539 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0011-2275
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
Y1Ba2Cu307\_x and Bi2Sr2CalCu208+ x Ag sheathed high Tc superconductor wires have been prepared using the powder in tube technique. Characterization of wire specimens was performed mainly by measuring critical current densities at 77 K and 4.2 K, as well as by a.c. susceptibility measurements. Where
The superconducting transition and critical current density were studied for epitaxial YBa2Cu307\_x thin films as a function of temperature, magnetic field and electric voltage gradient. A linear section of the curve of the logarithm of apparent voltage versus transport current density, In(E)-J, was
The field dependences of the critical current, current-voltage characteristics and a.c. susceptibility have been investigated for superconducting YBa2Cu307 films prepared by laser ablation. It was shown that the flux line pinning in polycrystalline high Tc films occurs due to anisotropy of the super
This paper reports the experimental investigations into two different methods of reducing flux creep and magnetic relaxation in high T c YBa2Cu307 and low T c Nb-Ti. For temperatures T \_< 4.2 K temperature reduction leads to a considerable reduction of the flux creep rate. The second method for red