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(Color online) (a) STM topographic image under ambient conditions. The inset shows a detail of the nanostripes revealing a periodicity of about . The height of the nanostripes is about . (b) Tapping-mode AFM image of the same sample. The profile below compares the modulation height across the nanostripes to the unit cell (uc) height in NEG samples.
(Color online) EBSD image quality (IQ) map of a NEG melt-textured sample, resembling a backscattered electron image. The IQ map contains information about the image quality of the recorded Kikuchi pattern at each point, giving an insight into the crystalline quality at the analyzed point. These measurements were performed using an EBSD step size of . The dark stripes correspond to the twins, while the elongated bright spots correspond to the nanostripes.
(Color online) (a) Details of the IQ map with higher magnification. The elongated white spots form characteristic lines which correspond to the nanostripes, as measured by AFM/STM. The sketch below the map illustrates the arrangement of the nanoclusters which form the nanostripes. (b) Corresponding inverse pole figure (IPF) map in the (0 0 1) direction as an overlay to the IQ map. Here, no changes in crystallographic orientation are observed at the nanoclusters. The color code for this map is given in the stereographic triangle.
Profiles along the nanostripes taken from the EBSD-IQ map (a) along the stripe direction and (b) perpendicular to it.
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