The suppression of superconductivity in the Gd1−xPrxBa2−ySryCu3O7−δ system

✍ Scribed by Guanghan Cao; Yitai Qian; Xiaojun Li; Hongkai Wu; Zuyao Chen; Yuheng Zhang

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 368 KB
• Volume: 248
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(95)00218-9

✦ Synopsis

The variations of superconductivity in Gdl_xPrxBa2_ySryCu307_~ have been studied. The system keeps "123" structure through the solid solution ranges of 0 < x < 1 and 0 _< y < 1. The critical Pr concentration for the quenching of superconductivity is about 0.45 when y = 0, and is increased to about 0.6 when y = 1.0. In the series Gd0.55Pro.45Ba2-ySryCu307-8, it is observed that superconductivity reappears when y > 0.5. These results further indicate that there is an "ion-size effect" on T c at the Ba-site, which was discussed in terms of the Pr-O covalent bonding effect.