| Автор | Anurag Gupta |
| Автор | Rajvir Singh |
| Автор | D P Singh |
| Автор | A V Narlikar |
| Дата выпуска | 2000-08-21 |
| dc.description | We report a study of metal (M = Fe, Co, Ni, and Ga) substitution at Cu sites in small quantities (x = 0.0, 0.03, 0.045 and 0.06) in fully oxygenated (y = 0.09) and oxygen deficient (y = 0.24 and 0.32) polycrystalline ErBa<sub>2</sub>Cu<sub>3-x</sub>M<sub>x</sub>O<sub>7-y</sub>. In contrast to Fe, Co and Ga, the site preference (Cu-O chains/CuO<sub>2</sub> planes) for Ni is found to depend on the oxygen content of the host system. The substitution of Fe, Co and Ga (and Ni in an oxygen deficient set of samples), with respect to the pure (x = 0) samples, results in a 10-45% reduction in orthorhombic distortion and a negligible (y = 0.01-0.03) change in oxygen content. The analysis of these variations suggests the formation of oxygen vacancy disorder in CuO<sub>2</sub> planes and/or in Cu-O chains, which may have an important role in determining the striking changes observed in a host of properties of ErBa<sub>2</sub>Cu<sub>3-x</sub>M<sub>x</sub>O<sub>7-y</sub>. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Substituted ErBa<sub>2</sub>Cu<sub>3-x</sub>M<sub>x</sub>O<sub>7-y</sub> (M = Fe, Co, Ni, and Ga): possibility and impact of local structural disorder in CuO<sub>2</sub> planes |
| Тип | paper |
| DOI | 10.1088/0953-8984/12/33/306 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 12 |
| Первая страница | 7381 |
| Последняя страница | 7393 |
| Аффилиация | Anurag Gupta; National Physical Laboratory, New Delhi 110012, India |
| Аффилиация | Rajvir Singh; National Physical Laboratory, New Delhi 110012, India |
| Аффилиация | D P Singh; National Physical Laboratory, New Delhi 110012, India |
| Аффилиация | A V Narlikar; National Physical Laboratory, New Delhi 110012, India |
| Выпуск | 33 |
