Lattice and electronic structure of YBa2Cu2PbOx superconductor

Bhattacharya, D. ; Pandya, D. K. ; Kashyap, S. C. ; Pathak, L. C. ; Mishra, S. ; Sen, D. ; Chopra, K. L. (1990) Lattice and electronic structure of YBa2Cu2PbOx superconductor Physica C: Superconductivity, 170 (3-4). pp. 245-248. ISSN 0921-4534

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A new dominant orthorhombic phase with lattice constants a = 4.28 Å, b = 4.34 Å and c = 12.84 Å, has been found to be coexisting with the conventional yttrium cuprate phase (123) in the YBa2Cu2PbOx s superconductor prepared by pyrophoric process. The bulk specimen exhibits Tc (onset) at 93 K and Tc (R = 0) at 80 K. X-ray photoelectron spectroscopic investigation reveals that lead is present in the material in both, the +2 and +4, valence states. The presence of lead increases the Cu2+ valence state and is possibly responsible for a lower Tc (R = 0).

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:69134
Deposited On:08 Nov 2011 11:13
Last Modified:08 Nov 2011 11:13

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