Correlation between the oxygen and content and property of superconducting Ce_0.15Nd_1.85CuO_4-y

Abstract

We synthesized Ce_0.15Nd_1.85CuO_4-y by the polymerized complex method. For the generation of the oxygen defects, the synthesized samples were annealed at 900-950 ºC for 20h under Ar atmosphere and then quenched to room temperature under the same atmosphere. The oxygen content for these samples was measured by hydrogen reduction with thermogravimetric analyzer. The dc magnetic susceptibility for these samples was measured by SQUID magnetometer.From the result, we could get samples which have different oxygen content by control of annealing temperature and it suggests correlation between oxygen content and Tc.