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The formation of patterned nanostructure in AgCo/Pt/MgO(001) thin film issimulated by a technique of combining molecular dynamics and phase-fieldtheory. The dislocation (strain) network existing in Pt/MgO is used as atemplate whose pattern is transferred to AgCo phase in spinodal decomposition,resulting in regular arrays of Co islands that are attracted by thedislocations. The influence of various factors, such as component concentrationand film thickness, is studied. It is found that the spinodal decomposition ofAgCo in this system is mainly characterized by a competition between asurface-directed layer structure and the strain-induced patterned structure,where the patterned Ag-Co structure only dominates in a small range near theinterface (less than 10 atomic layers). However, if the interlayer diffusioncan be minimized by controlling film growth conditions, it is shown that thepatterned structure can be formed throughout the entire film.Comment: 8 pages, 12 figure

Patterned nanostructure in AgCo/Pt/MgO(001) thin films