Confirmation of Ba-rich Nd_1+<i>x</i>Ba_2-<i>x</i>Cu₃O_7-δsolid solutions

Abstract

Unlike Y-Ba-Cu-O, the Nd-Ba-Cu-O system forms a Nd1+xBa2-xCu3O7-δ-type solid solution (Nd123ss). Recently, it was found that Nd123ss with x<0 can be stabilized at high temperatures under a low oxygen partial pressure, P(O2). In the present study, we further confirmed the presence of a Ba-rich Nd123ss single phase through the investigation of the x dependence of lattice parameters and the P(O2) dependence of the peritectic decomposition temperatures in Nd123ss samples with various x values.