Preparation and superconducting properties of YBa 2Cu 4O 8
Abstract
Samples of YBa 2Cu 4O 8 are prepared by means of a new high oxygen pressure technique employing oxygen-HIP. Both magnetization and resistivity measurements show the superconductivity transition at 82.5 K. The lower and upper critical fields of YBa 2Cu 4O 8 are obtained from the magnetization measurements. The Ginzburg-Landau parameters, ζ(0)=17 Å, λ(0)=2400 Å, are estimated from these results.
- Publication:
-
Physica C Superconductivity
- Pub Date:
- October 1989
- DOI:
- 10.1016/0921-4534(89)90432-2
- Bibcode:
- 1989PhyC..160..541M