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(Color online) RHEED pattern of a thick Fe electrode along its  azimuth.
(Color online) Characteristic STM image of the surface of a Fe thick bottom electrode. Self-aligned structures can clearly be seen.
(Color online) High-resolution TEM image of a sample with the structure MgO, , , . Pyramids located at the interface between the Fe layer and the MgO capping are indicated by red arrows. The red ⊥ symbols mark the positions of the interfacial dislocations. The inset shows a zoom of the dislocation enclosed in the red square.
(Color online) STM images of Fe particles deposited on top of a MgO tunnel barrier for different thicknesses of the Fe bottom electrode. (a) ; (b) .
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