Abstract
The effect of different γ-irradiation doses on the critical current density, Jc, in a Bi1.6Pb0.4Sr 2Ca2Cu3O10 superconducting polycrystal has been investigated under several values of applied magnetic field and at temperatures from 80 to 105 K using I-V measurements. Two doses of γ-irradiation were used: 50 and 300 MR. The specimen was prepared using the solid-state reaction technique. We found that for γ-irradiation dose of 50 MR the values of Jc were enhanced through the whole temperature range for all applied fields. This enhancement of Jc values is significant at low temperatures. We also found that for a γ-irradiation dose of 300 MR Jc values were suppressed at all temperatures for all applied fields. This reduction of Jc values is significant at low temperatures. At high temperatures both doses of γ-irradiation were found to have a very small effect on Jc values. These results are discussed in terms of the effect of defects produced by γ-rays and grain boundaries on the vortex pinning forces in the samples.
Original language | English |
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Pages (from-to) | 151-154 |
Number of pages | 4 |
Journal | Superconductor Science and Technology |
Volume | 19 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jan 1 2006 |
ASJC Scopus subject areas
- Ceramics and Composites
- Condensed Matter Physics
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry