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Oxygen stoichiometry and structure of YBa2Cu3O7−δ and their relation to superconductivity

Rao, CNR and Ganapathi, L and Ram, Mohan RA (1988) Oxygen stoichiometry and structure of YBa2Cu3O7−δ and their relation to superconductivity. In: Materials Research Bulletin, 23 (1). pp. 125-131.

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Official URL: http://dx.doi.org/10.1016/0025-5408(88)90234-6


Thermogravimetric curves of the superconducting samples (0.0 ≤ δ left angle bracket0.5) of YBa2Cu3O7−δ are shown to be characteristically different from those of the non-superconducting samples (δreverse similar, equals0.5–1.0). The variation of Tc (from resistivity measurements) with δ confirms for a change from Image to Image Bands found in bright or dark field electron micrographs are shown to arise for different orientations of the [CuO2]∞ planes, causing oxygen enrichment in the boundaries. A new defect with missing Y-rows is found in the images of Y1−xBa2Cu3O7.

Item Type: Journal Article
Publication: Materials Research Bulletin
Publisher: Elsevier science
Additional Information: Copyright of this article belongs to Elsevier science.
Keywords: Oxides;superconductors;oxygen;yttrium;barium;copper.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 25 Sep 2010 06:28
Last Modified: 25 Sep 2010 06:28
URI: http://eprints.iisc.ac.in/id/eprint/32444

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