Typical TEM images of the as-grown (a) and the annealed (d) MnGe thin films with a thickness of 15 nm; the left column is for the as-grown film and the right column is the film after 400°C annealing. (b) and (e) are the corresponding HRTEM images of (a) and (d), respectively; (c) and (f) EFTEM elemental maps of Mn correspond to the regions given by (a) and (d), respectively. The white arrows in (b) and (e) show the separation between the glue and the amorphous MnGe layer.
