𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The nature of transport critical current hysteresis in HTSC: magnetic fields and high pressures

✍ Scribed by V.M. Svistunov; A.I. D'yachenko; V.Yu. Tarenkov

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
167 KB
Volume
185-189
Category
Article
ISSN
0921-4534

No coin nor oath required. For personal study only.

✦ Synopsis

It was found that pressure has a strong influence on the critical current hysteresis loop of cerar01cs at H ~ I0 kOe. The phenomenon is attributed to the critical current hysteresis of separate Josephson contacts and is due to the Abrikosov vortex density gradient within granules. The gradient defines both the sign and the value of the pinning current, whereas the sign of Melssner reversible surface current component is determine4 by the external field H direction. As a result the critical current of Josephson contacts define4 by the total surface value depends on them agnetic prehistory of a sample.

πŸ“œ SIMILAR VOLUMES

Magnetic field dependence of the critica
Magnetic field dependence of the critical currents in high Tc superconductors
✍ Ljiljana DobrosavljeviΔ‡-GrujiΔ‡; Zoran RadoviΔ‡ πŸ“‚ Article πŸ“… 1991 πŸ› Elsevier Science 🌐 English βš– 188 KB

It is shown, within a simple model calculation, that the critical current density of an S/N/S junction in a high paralel magnetic field decays exponentially. The comparison of the theoretical results with experimental data for the Pb/Cd/Pb junction and YBCO films is given.

Asymmetric critical currents of Nb and Y
Asymmetric critical currents of Nb and YBCO thin films for the polarity of the transport current in parallel magnetic fields
✍ F. Ichikawa; T. Nishizaki; K. Yamabe; Y. Yamasaki; T. Fukami; T. Aomine πŸ“‚ Article πŸ“… 1994 πŸ› Elsevier Science 🌐 English βš– 154 KB

In order to investigate a surface effect on flux pinning, transport critical currents JΒ’ of Nb and YBa2Cu3Ov\_z thin films have been measured in magnetic fields B parallel to the surface. It is found that in both fihns the magnitude of Jc changes when tile direction of the Lorentz force is reversed.