| Автор | Hong Gui |
| Автор | Xiaowen Zhang |
| Автор | Binglin Gu |
| Дата выпуска | 1996-03-04 |
| dc.description | The stabilities of different kinds of ordered structure in complex perovskites have been studied by the eight-point cluster variation method (CVM). The grand potentials of these structures have been calculated and compared with that of the disordered state. It has been proved that the -type ordered structure will be stable in the system when the nearest-neighbour interaction is much stronger than other longer-distance interactions. The - and -type ordered structures result from the next-nearest- and the third-neighbour interactions respectively. The grand potentials of the - and -type ordered structures reach minima at the composition x = 0.5, whereas the grand potential of one of the -type ordered structures reaches its minima at around x = 0.25 and x = 0.75. The formation of different kinds of ordered structure in real material systems has been discussed. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Possible order - disorder phase transitions in and complex perovskites |
| Тип | paper |
| DOI | 10.1088/0953-8984/8/10/019 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 8 |
| Первая страница | 1491 |
| Последняя страница | 1501 |
| Выпуск | 10 |
