Preparation and Physical Properties of Indium-based Cuprate Compounds InBa_2-xLa_xCuO_y

Abstract

Higher superconducting transition temperature T_c is achieved in longer Cu-Cu bond distance samples. In this study, indium-based cuprate compounds with long Cu-Cu bond distance were prepared via solid-state reaction. The parent compound InBa₂CuO_4.44 is not electrically conducting due to the lack of oxygen ions in the CuO₂ layer. In order to make it conducting, the oxygen content should be increased. For this purpose, polycrystalline InBa_2-xLa_xCuO_y samples were prepared. In case of x = 1.0, single-phase compounds were prepared. Unfortunately, it is not superconductor but semiconductor.