The axial orientation of molecular-beam-epitaxy (MBE)-grown Fe3 Si (111) Ge (111) hybrid structures was investigated by Rutherford backscattering spectroscopy. We confirmed that during MBE above 300 °C, the interdiffusion of Fe and Ge atoms results in a composition change and the epitaxial growth of FeGe in Fe3 Si. Low-temperature (<200 °C) MBE can realize fully ordered D O3 - Fe3 Si with highly axial orientation [minimum yield (min) =2.2%]. Postannealing above 400 °C results in a composition change and the degradation of axial orientation in the off-stoichiometric Fe3 Si. The significance of stoichiometry with regard to thermal stability and the interfacial quality of Fe3 Si (111) Ge (111) hybrid structures was also discussed.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)