The effects of Pr-doping on the critical current density in YBa 2Cu 3O 7- δ
Abstract
The effects of Pr-doping on the critical current density Jc and the critical temperature Tc in YBa 2Cu 3O 7- δ (YBCO) have been investigated. In spite of the monotonic decrease in Tc with increasing Pr-concentration ( x), the increasing of Jc occurs as a field is applied and Jc displays a maximum at a certain x. Moreover, this maximum shifts to lower x by increasing fields. The characteristic behavior of Jc with Pr-doping can be explained in terms of the counterbalance of two different effects simultaneously caused by Pr-doping: the suppression of matrix superconductivity which leads to the decrease in depairing critical current density J0, and the formation of nanometric inhomogeneity which leads to the enhancement of pinning force.
- Publication:
-
Physica C Superconductivity
- Pub Date:
- December 2002
- DOI:
- 10.1016/S0921-4534(02)01261-3
- Bibcode:
- 2002PhyC..383...48H