| Автор | M Dudley |
| Автор | Shaoping Wang |
| Автор | Wei Huang |
| Автор | C H Carter Jr |
| Автор | V F Tsvetkov |
| Автор | C Fazi |
| Дата выпуска | 1995-04-14 |
| dc.description | Synchrotron white-beam X-ray topography studies, in conjunction with Nomarski optical microscopy, have been carried out on 6H-SiC single crystals grown by the sublimation physical vapour transport technique. Two kinds of dislocations were observed using topography: dislocations exhibiting bimodal images of various widths and with line directions approximately parallel to the (0001) axis and dislocations confined to the basal plane, which appear to have emanated from the former dislocations. The larger bimodal image width dislocations were found to have hollow cores, known as 'micropipes'. Detailed contrast analysis of topographic images obtained in transmission and back-reflection geometries establishes that 'micropipes' are Frank-type hollow-core screw dislocations with Burgers vectors typically equal to 3-7 times the c lattice parameter. X-ray topography also revealed many line defects approximately parallel to the (0001) axis that were determined to be screw dislocations with Burgers vectors equal to the c lattice parameter and there were no discernible 'micropipes' associated with these latter screw dislocations. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | White-beam synchrotron topographic studies of defects in 6H-SiC single crystals |
| Тип | paper |
| DOI | 10.1088/0022-3727/28/4A/012 |
| Electronic ISSN | 1361-6463 |
| Print ISSN | 0022-3727 |
| Журнал | Journal of Physics D: Applied Physics |
| Том | 28 |
| Первая страница | A63 |
| Последняя страница | A68 |
| Аффилиация | M Dudley; Dept. of Mater. Sci. & Eng., State Univ. of New York, Stony Brook, NY, USA |
| Аффилиация | Shaoping Wang; Dept. of Mater. Sci. & Eng., State Univ. of New York, Stony Brook, NY, USA |
| Аффилиация | Wei Huang; Dept. of Mater. Sci. & Eng., State Univ. of New York, Stony Brook, NY, USA |
| Аффилиация | C H Carter Jr; Dept. of Mater. Sci. & Eng., State Univ. of New York, Stony Brook, NY, USA |
| Аффилиация | V F Tsvetkov; Dept. of Mater. Sci. & Eng., State Univ. of New York, Stony Brook, NY, USA |
| Аффилиация | C Fazi; Dept. of Mater. Sci. & Eng., State Univ. of New York, Stony Brook, NY, USA |
| Выпуск | 4A |
