| Автор | Députier, S. |
| Автор | Guérin, R. |
| Автор | Guivarc'h, A. |
| Дата выпуска | 1998 |
| dc.description | Solid state phase equilibria in the ternary Fe-Ga-As diagram were determined at 600 °C using powder X-ray diffraction as experimental techniques. Very limited solid solubilities were measured in the binary constituent Fe-Ga and Fe-As compounds. In the Fe-rich part of the diagram, a ternary phase was evidenced which corresponds in fact to a solid solution into which Ga and As substitute one another on the same sublattice. This phase, which can be expressed by the general formula Fe<sub>3</sub>Ga<sub>2−x </sub>As<sub> x </sub> (0.20 ≤ x ≤ 1.125), crystallizes in hexagonal symmetry; it is structurally derived from the NiAs type-structure (B8<sub>1</sub>) and can be considered, owing to its c/a ratio (1.23 ≤ c/a ≤ 1.28) close to $\sqrt{3}/\sqrt{2}$, as hexagonal-pseudocubic. The original feature of this experimental diagram is the occurrence of a tie-line between this ternary phase and the semiconductor GaAs which differs significantly from the theoretical diagram, estimated from simplified calculations proposed by Schmid-Fetzer. In particular, it is the first time that such a ternary phase M<sub> x </sub>(Ga, As)<sub> y </sub> (M = transition metal) is found to be in thermodynamic equilibrium with GaAs. This fact suggests that the solid state interdiffusions which occur during the annealing of a Fe/GaAs heterostructure could lead to a ferromagnetic, epitaxial and stable Fe<sub>3</sub>GaAs/GaAs contact. |
| Формат | application.pdf |
| Издатель | EDP Sciences |
| Копирайт | © EDP Sciences, 1998 |
| Название | Solid state phase equilibria in the Fe-Ga-As system |
| Тип | research-article |
| DOI | 10.1051/epjap:1998100 |
| Electronic ISSN | 1286-0050 |
| Print ISSN | 1286-0042 |
| Журнал | The European Physical Journal Applied Physics |
| Том | 2 |
| Первая страница | 127 |
| Последняя страница | 133 |
| Аффилиация | Députier S.; Laboratoire de Chimie du Solide et Inorganique Moléculaire (UMR CNRS-Université 6511), Campus de Beaulieu, 35042 Rennes Cedex, France |
| Аффилиация | Guérin R.; Laboratoire de Chimie du Solide et Inorganique Moléculaire (UMR CNRS-Université 6511), Campus de Beaulieu, 35042 Rennes Cedex, France |
| Аффилиация | Guivarc'h A.; Équipe de Physique des Surfaces et des Interfaces (UMR CNRS-Université 6627), Campus de Beaulieu, 35042 Rennes Cedex, France |
| Выпуск | 2 |
