Synthesis of Infinite-layered Superconductor under High Pressure

Abstract

High quality samples of both the alkaline-earth deficient type and the rare-earth substituted type of infinite-layered superconductors have been synthesized using a cubic anvil high-pressure apparatus. The result of oxygen content analysis by means of iodometry strongly supports the assertion that the A cation deficient phase can be either a p-type or an n-type superconductor, while the rare-earth substituted ones are n-type.