Abstract
We are reporting on results of dc magnetization measurements of the new electron-doped superconductors. The effect of on is similar to that of , although the extra electron of the former comes from the Cu-O planes. For example, for x=0.12 the undoped compound (y=0) is not superconducting; but by the addition of Ga (y=0.03), the material becomes superconducting at =20 K, and the Meissner fraction and the critical current density are improved compared to . The irreversibility line for doped and undoped samples scales with the applied field as , with p≃0.6, but for the Ga-doped sample it is pushed to higher temperatures.
- Received 5 September 1989
DOI:https://doi.org/10.1103/PhysRevB.40.11366
©1989 American Physical Society