Crystal structure of aluminium containing superconducting oxides: single crystal study of GdBa2Cu3−x AL x O6.88 (x=0.28) and ErBa2Cu3−y Al y O6.6 (y=0.14)
| Autor: | W. Wirges, K. Fischer, P. J. Brown, H. G. Von Schnering, T. Chattopadhyay, D. Thiery, L. Walz, H. Maletta |
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| Rok vydání: | 1990 |
| Předmět: |
Superconductivity
chemistry.chemical_classification Materials science Magnetic structure Neutron diffraction Crystal structure Crystallography chemistry X-ray crystallography Antiferromagnetism Condensed Matter::Strongly Correlated Electrons General Materials Science Single crystal Inorganic compound |
| Zdroj: | Zeitschrift für Physik B Condensed Matter. 80:177-180 |
| ISSN: | 1431-584X 0722-3277 |
| DOI: | 10.1007/bf01357499 |
| Popis: | Following the discovery of the high temperature super-conductivity in YBa2Cu3O7−δ (T c ≃93 K) [1] it has been found that Y atoms can be substituted entirely by almost all of the rare-earth elements, except for Ce, Pr, and Tb, without changing the superconducting properties appreciably [2, 3]. The magnetic moments carried by the rare-earth atoms have apparently no influence on the superconducting properties. In Nd-, Sm-, Gd-, Dy- and Er-based compounds the rare earth moments order at low temperatures (0.025–2.2 K) [4–8] and the ordered antiferromagnetic state coexists with the superconducting state. We have investigated the antiferromagnetic ordering of these compounds by neutron diffraction both on powder and single crystal samples obtained from several laboratories [8–10]. Magnetic structures of all these compounds consist of antiferromagnetic (001) planes stacked ferro- or antiferromagnetically. There have been some controversies as to the stacking of antiferromagnetic (001) planes in GdBa2Cu3O7−δ. |
| Databáze: | OpenAIRE |
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