Substitution on the Cu(1) sites in Y1Ba2Cu3O7−δ; evidence for distorted chains of Co and Fe atoms

✍ Scribed by F. Bridges; J.B. Boyce; T. Claeson; T.H. Geballe; J.M. Tarascon

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 125 KB
• Volume: 162-164
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(89)90547-9

✦ Synopsis

X-ray absorption studies indicate that Co replaces Cu(1) in Y1Ba2Cu307-6 at low concentrations, but the CoO) sites are severely distorted. A zig-zag chain model for the Co is consistent with the observed first and second neighbor distances. A similar behavior is observed for Fe; however, Ni-doped samples exhibit little distortion and a uniform occupation of Cu(1) and Cu(2) sites.