Abstract
An extensive study of magnetic, thermal, transport, and structural properties of the alloy is presented. The endpoints of the alloy series are a high-temperature superconductor Y-Ba-Cu-O and an antiferromagnetic semiconductor (Pr-Ba-Cu-O, =17 K). The superconducting transition temperature is reduced with increasing Pr concentration following the Abrikosov-Gorkov pair-breaking curve with critical concentration . Alloying also reduces the Néel temperature approximately linearly with the Y content, and there is a concentration region (0.4<x<0.6) where antiferromagnetism and superconductivity is suggested to coexist. The specific heat, the susceptibility, the magnetic ordering, and the metal-to-semiconductor transition seen in the resistivity are consistent with the picture that is replaced by with some degree of valence admixture of the configuration.
- Received 22 March 1989
DOI:https://doi.org/10.1103/PhysRevB.40.4453
©1989 American Physical Society