Grain boundary diffusion in Bi-Pb-Sr-Ca-Cu-O compound
- 1 October 1990
- journal article
- Published by IOP Publishing in Superconductor Science and Technology
- Vol. 3 (10) , 517-519
- https://doi.org/10.1088/0953-2048/3/10/009
Abstract
Zinc has been diffused along the grain boundaries of Bi1.5Pb0.5Sr2Ca2Cu3O10 compound at relatively low temperatures. For diffusion at 260 degrees C for 150 hours, the transition temperature, Tc, at zero resistance dropped from 105 to 92 K, while the transport critical current density, Jc, dropped from 12.5 to 4.2 A cm-2. The normal state resistivity at room temperature increased from 3.7 to 7.0 m Omega cm. The presence of Zn was confirmed by Auger electron microscopy. Diffusion of Zn at 450 degrees C for 150 hours deteriorated the superconducting materials further. Tc dropped to 83 K and Jc to 3.4 A cm-2. The results show that Tc and Jc in high-Tc superconductors can be affected by selected doping of the grain boundaries.Keywords
This publication has 11 references indexed in Scilit:
- Dopant Effects on the Superconductivity in the Bi-Sr-Ca-Cu-O SystemJapanese Journal of Applied Physics, 1989
- Critical Currents in [001] Grains and across Their Tilt Boundaries in Y FilmsPhysical Review Letters, 1988
- Small field behavior of critical current in Y1Ba2Cu3O7 sintered samplesApplied Physics Letters, 1988
- Anomalously largedepression by Zn substitution in Y-Ba-Cu-OPhysical Review B, 1988
- Proximity effect and high Tc superconductivityCryogenics, 1988
- Josephson-junction model of critical current in granular superconductorsPhysical Review B, 1988
- Weak link problem and intragrain current density in polycrystalline Bi1Ca1Sr1Cu2Ox and Tl2Ca2Ba2Cu3O10Zeitschrift für Physik B Condensed Matter, 1988
- Auger study of grain boundaries in large-grained YBa2Cu3OxApplied Physics Letters, 1988
- Critical-current measurements in epitaxial films of compoundPhysical Review Letters, 1987
- Bulk superconductivity at 91 K in single-phase oxygen-deficient perovskitePhysical Review Letters, 1987