Formation of atomically flat β-FeSi2/Si(100) interface using ion irradiated substrate
2012
Abstract Thin uniform β-FeSi 2 films were fabricated on ion irradiated Si(100) substrates to achieve an atomically flat interface. Ion irradiation produces a surface with more defects than chemical etching; however, it is expected that the presence of defects can promote the formation of compound films such as β-FeSi 2 that require interdiffusion and reaction processes. However, excess defects can also result in random nucleation, poor crystallinity and a rough interface. Cross-sectional transmission electron microscopy was used to determine the optimum conditions for ion irradiation of the substrate to obtain a clear β-FeSi 2 /Si interface.
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