| Автор | P Balmer |
| Автор | H Blum |
| Автор | M Forster |
| Автор | A Schweiger |
| Автор | Hs H Gunthard |
| Дата выпуска | 1980-02-10 |
| dc.description | The redox process of Co<sup>+z</sup> ions (z=2,3) substituted into the sapphire alpha -Al<sub>2</sub>O<sub>3</sub> structure produced by heat treatment in H<sub>2</sub> and O<sub>2</sub> atmosphere is correlated with ESR and ENDOR spectra of (Co<sup>+2</sup>, H<sup>)</sup>) and with UV-VIS and IR spectra of Co<sup>+3</sup>: alpha -Al<sub>2</sub>O<sub>3</sub> and (Co<sup>+2</sup>, H<sup>+</sup>): alpha -Al<sub>2</sub>O<sub>3</sub> respectively. From ENDOR spectra the charge compensator H<sup>+</sup> for Co<sup>+2</sup>(c): alpha -Al<sub>2</sub>O<sub>3</sub> is uniquely identified and the reduction of the crystal-field symmetry by it from D<sub>3d</sub> to C<sub>1</sub> is demonstrated. Location of the charge compensator and structural parameters of the defect (Co<sup>+2</sup>,H<sup>+</sup>): alpha -Al<sub>2</sub>O<sub>3</sub> are determined. Furthermore, it is shown that the proton-ENDOR spectra of (Co<sup>+2</sup>, H<sup>+</sup>): alpha -Al<sub>2</sub>O<sub>3</sub> are described by a hyperfine interaction term characterised by an asymmetric coupling tensor originating from dipole-dipole interaction. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Co<sup>+z</sup> -α-Al<sub>2</sub>O<sub>3</sub>: cobalt and proton ENDOR, infrared and optical spectra, the nature of the charge compensator and the structure of the defect (Co<sup>+2</sup>, H<sup>+</sup>): α-Al<sub>2</sub>O<sub>3</sub> |
| Тип | paper |
| DOI | 10.1088/0022-3719/13/4/011 |
| Print ISSN | 0022-3719 |
| Журнал | Journal of Physics C: Solid State Physics |
| Том | 13 |
| Первая страница | 517 |
| Последняя страница | 534 |
| Аффилиация | P Balmer; Swiss Federal Inst. of Technol., Zurich, Switzerland |
| Аффилиация | H Blum; Swiss Federal Inst. of Technol., Zurich, Switzerland |
| Аффилиация | M Forster; Swiss Federal Inst. of Technol., Zurich, Switzerland |
| Аффилиация | A Schweiger; Swiss Federal Inst. of Technol., Zurich, Switzerland |
| Аффилиация | Hs H Gunthard; Swiss Federal Inst. of Technol., Zurich, Switzerland |
| Выпуск | 4 |
