Synthesis and superconducting properties of (Pb0.5Cd0.5)Sr2(Y0.5Ca0.5)Cu2O7

✍ Scribed by J.R. Min; J.K. Liang; X.L. Chen; C. Wang; C. Dong; Y.D. Yu; X.R. Cheng; G.H. Rao

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 456 KB
• Volume: 245
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(95)00111-5

✦ Synopsis

The effect of synthesis conditions on (PbU,5Cdu.s)Sr;l(Yn,SCan.s)CU20, has been investigated. For the (Pb,Cd).1212 phase, quenching is not necessary. Quenching the (Pb,Cd)•1212 phase exclusively suppresses its superconductivity, although quenching is favorable for the {Pb,Cu)-1212 phase in removing the extra oxygen of the (Pb,Cu)O layers. On the other hand, annealing the (Pb,Cd)-1212 phase in flowing nitrogen leads to a phase decomposition from Pb-1212 phase to Pb-3212 phase. In this paper, we report the optimal synthesis condition for the (Pb,Cd)-1212 phase by annealing the (Pb,Cd)-1212 phase at 970°C in O 2 for 2 h.