Rao, C. N. R. ; Ganapathi, L. ; Mohan Ram, R. A. (1988) Oxygen stoichiometry and structure of YBa2Cu3O7−δ and their relation to superconductivity Materials Research Bulletin, 23 (1). pp. 125-131. ISSN 0025-5408
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/002554...
Related URL: http://dx.doi.org/10.1016/0025-5408(88)90234-6
Abstract
Thermogravimetric curves of the superconducting samples (0.0≤δ<0.5) of YBa2Cu3O7−δ are shown to be characteristically different from those of the non-superconducting samples (δ⋍0.5-1.0). The variation of Tc (from resistivity measurements) with δ confirms for a change from chain-super-conductivity to plain-superconductivity. 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: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Oxides; Superconductors; Oxygen; Yttrium; Barium; Copper |
| ID Code: | 42391 |
| Deposited On: | 02 Jun 2011 12:57 |
| Last Modified: | 02 Jun 2011 12:57 |
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