Lithium substituted superconducting Y 1Ba 2Cu 4O 8 formed in elevated oxygen pressure
Abstract
Partial substitution of lithium in Y 1Ba 2Cu 4O 8 has been accomplished by reacting the constituent oxides with LiOH·H 2O at elevated oxygen pressure (200 bar). Tc falls gradually at a rate of approximately 2 K/at.% of lithium added, up to the solubility limit of ∼ 0.13 Li/formula unit. When Li content is increased further Tc remains nearly constant at 57-58 K and the volume fraction of the superconducting phase decreases progressively.
- Publication:
-
Physica C Superconductivity
- Pub Date:
- March 1992
- DOI:
- 10.1016/0921-4534(92)90749-3
- Bibcode:
- 1992PhyC..192..103C