An Investigation of the Transformation from Bi2Sr2CaCu2O8to Bi2Sr2Ca2Cu3O10

✍ Scribed by H. Faqir; H. Chiba; O. Monnereau; G. Vacquier; M. Kikuchi; Y. Syono

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 306 KB
• Volume: 139
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1997.7717

✦ Synopsis

The phase stabilization of the (Bi 1.6؉y Pb 0.4 )Sr 2؊x Ca 2؉x Cu 3 O z system has been studied in the composition ranges 04 4x4 40.25 and 04 4y4 40.4 by X-ray powder diffraction, magnetic susceptibility, and electrical resistivity measurements. The transformation from Bi 2 Sr 2 CaCu 2 O 8 to Bi 2 Sr 2 Ca 2 Cu 3 O 10 is a slow process and the Bi 2 Sr 2 Ca 2 Cu 3 O 10 phase can be stabilized by a small excess of Bi and partial substitution of Sr by Ca. A final, nearly pure Bi 2 Sr 2 Ca 2 Cu 3 O 10 phase (T c ‫؍‬ 107 K, T c ‫؍‬ 6-8 K) was obtained after 200 h annealing. Both X-ray analysis and magnetic susceptibility measurements appear to be excellent methods for monitoring such superconducting phases.