Vacuum annealing effects on Bi1.8Pb0.2Sr2Ca2Cu3O9.9+y high temperature superconductor

✍ Scribed by Yoshihide Kimishima; Jun Nakano

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 145 KB
• Volume: 185-189
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(91)91641-g

✦ Synopsis

The lattice parameters a and c, superconducting onset temperature Te 0n and volume fraction rate of high T¢ superconductive phase fs were investigated for the Biz.ePbe.2Sr2Ca2Cu309.9÷~-8 system. Here y~J).3 and 6 Is the amount of oxygen deficiency per chemical formula unit by vacuum annealing. The steep changes of a, c, Te 0n and fs were observed at 0<8<0.3, and the fs became zero at 8=ac~1.6. The above experimental results were discussed on the basis of hole donor reduction by the oxygen deficiency.