THE EFFECT OF Ag-DOPING ON THE CRITICAL CURRENT DENSITY OF YBa2Cu3O7−δ SUPERCONDUCTORS
- 1 April 1988
- journal article
- Published by World Scientific Pub Co Pte Ltd in Modern Physics Letters B
- Vol. 2 (2) , 589-595
- https://doi.org/10.1142/s0217984988000217
Abstract
The superconducting state and the transition temperature Tc of the interstitially Ag-doped YBa 2 Cu 3 O 7−δ are not changed even when the Ag concentration is increased up to 20%, whereas the substitutionally doped YBa 2 Cu 3−x Ag x O 7−δ system ceases to be superconductive when the contents x of Ag is over 1.2. Magnetic susceptibility measurement indicates that the interstitial Ag-doping yields higher diamagnetic signal and enhances the critical current density by 15 folds. Photoelectron emission and electron spin resonance spectroscopic studies elucidate that the copper ions change from diamagnetic to paramagnetic states at some doping levels.Keywords
This publication has 0 references indexed in Scilit: