Bhat, K. M. ; Gundakaram, Ravichandra ; Subbanna, G. N. ; Ganguli, A. K. (1995) Transformation of the oxygen-deficient 123 cuprates, LnBa2Cu3O7-δ (Ln = Nd, Gd,Dy, Er; 0.3 ≤ δ ≤ 0.4), to a 124-type structure on low-temperature annealing Solid State Communications, 95 (9). pp. 629-633. ISSN 0038-1098
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Official URL: http://www.sciencedirect.com/science/article/pii/0...
Related URL: http://dx.doi.org/10.1016/0038-1098(95)00312-6
Abstract
X-ray diffraction patterns of superconducting LnBa2Cu3O7-δ (Ln = Nd, Gd, Dy or Er) compositions (0.3 ≤ d ≤ 0.4; Tc 45-60K) show a significant change on annealing bulk samples at 473K for 48-60 hrs. The diffraction patterns of the annealed samples are very simple, with a low angle reflection corresponding to a c parameter of ~ 27Å, similar to that of 124 cuprates. The annealed product has a highly disordered structure, but contains lamellae of the 124 structure, as confirmed by electron microscopy.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 91651 |
| Deposited On: | 23 May 2012 14:19 |
| Last Modified: | 23 May 2012 14:19 |
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