In situ halide chemical vapor deposition of Bi2Sr2CaCu2O8 + x on silver substrates

✍ Scribed by Dr. Anders Hårsta; Stefan Lundquist

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 670 KB
• Volume: 2
• Category: Article
• ISSN: 0948-1907
• DOI: 10.1002/cvde.19960020305

✦ Synopsis

The superconducting Bi&zCaCuzOs+, phase is deposited on polycrystalline silver substrates by halide CVD in the temperature interval 760-820°C. Metal iodides and oxygen are used as precursor materials. The films grow with a pronounced [OOl] orientation, and a superconducting critical temperature of about 80 K was observed without any post-annealing. As far as the authors know, this is the first report of in situ CVD of the Bi-2212 phase on silver substrates. Some of the films were postannealed in a two-step process. The [ OO 11 orientation was now considerably improved, but the superconducting critical temperature was reduced to about 75 K.