Tuning the period of elastic MnAs/GaAs(001) alpha-beta pattern by Fe deposition
Résumé
The alpha-beta elastic striped pattern of MnAs/GaAs(001) is shown to be perturbed by Fe overlayer growth. After nanometric Fe thin film deposition, the elastic pattern is still present in the 10-45 degrees C temperature range, but the period of the pattern increases by up to 40% for MnAs epilayers 70 to 400 nm thick. This observation can be interpreted within a simple model calculation of the pattern elastic energy, providing quantitative agreement with the experimental results. (C) 2010 American Institute of Physics. [doi:10.1063/1.3531759]