Superconductivity at 40 K in the 1212 system (Pb1−xVx)Sr2(Ca1−zYz)Cu2O7−δ

✍ Scribed by W. Widder; M. Franz; L. Bauernfeind; H.F. Braun

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 415 KB
• Volume: 217
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(93)90801-v

✦ Synopsis

Samples of nominal composition (Pbt_xVx)Sr2(Cat_zY,)Cu20~_6 (0.1 <x<0.7, 0<z< 1 ) synthesised at 950°C in air were investigated. None of the as-prepared samples and of the samples post-treated in oxygen was superconducting. Some of the sampies post-treated in argon at 500°C exhibited superconductivity; the main phase of the sample with the nominal composition (PbonV0.3) St2 (Cao.4Yo.6)Cu,O~_ 6 had a tetragonal unit cell with a = 3.822 A, c = 11.818 A. This sample showed a T¢owt of 40 K as measured by the temperature dependence of the resistance.