Eur. Phys. J. AP
Volume 21, Number 3, March 2003
|Page(s)||179 - 185|
|Section||Surfaces, Interfaces and Films|
|Published online||27 February 2003|
An X-ray diffraction and Mössbauer study of interdiffusion phenomena at the interface between Fe and In0.5Ga0.5As (001)
Laboratoire de Métallurgie Physique, UMR 6630 CNRS-Université de Poitiers, bâtiment
SP2MI, Téléport 2, boulevard Marie et Pierre Curie, BP 30179, 86962
Futuroscope-Chasseneuil Cedex, France
2 Groupe de Physique des Matériaux, UMR 6634 CNRS-Université de Rouen, Faculté des Sciences et des Techniques de Rouen, place Emile Blondel, 76821 Mont-Saint-Aignan Cedex, France
Corresponding author: firstname.lastname@example.org
Revised: 22 October 2002
Accepted: 14 November 2002
Published online: 27 February 2003
Polycrystalline iron thin films on ion-etched monocrystalline In0.5Ga0.5As/InP (001) substrates were prepared using ion-beam sputtering deposition. The interface reaction was characterised by X-ray diffraction and conversion electron Mössbauer spectroscopy experiments, after annealing in vacuum for 1 h at temperatures between 350 and 450 °C. Interdiffusion phenomena mainly result in the formation of five new phases, namely metallic-In, InAs, Fe2As, Fe2InxAs () and Fe3GaAsx (), in agreement with the predictions of the phase diagrams. InAs results from the decomposition of the semiconductor substrate and remains (001)-textured. The iron-arsenide grains grow into the substrate below the Fe/In0.5Ga0.5As interface. The In precipitates reach ~40 nm in size after 1 h annealing at 450 °C, while the Fe3GaAsx phase appears at 400–450 °C with an either textured or disordered structure. Finally, the overall activation energy for the thermal reaction is calculated to be 1.5 eV in the latter temperature range.
PACS: 61.10.-i – X-ray diffraction and scattering / 68.35.-p – Solid surfaces and solid-solid interfaces: Structure and energetics / 76.80.+y – Mössbauer effect; other γ-ray spectroscopy
© EDP Sciences, 2003
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.