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Published byMarit Christophersen Modified over 6 years ago
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Critical misfit in thin film epitaxy - Example Problems
(A) Consider the thin film growth of Ni(111) on a single crystal Cu(111) surface. Determine the critical Thickness at which the 1st misfit dislocation forms. (B) Perform the same calculation for Cu(111) on Ni(111). Data set Lattice parameters, a: Ni: nm. Cu: nm Youngs modulus: Ni: 200 GPa. Cu: 127 GPa. Poisson’s ratio: Ni: Cu 0.32 Auxiliary calculations
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Critical misfit in thin film epitaxy - Example Problems
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Critical misfit in thin film epitaxy - Example Problems
(B) Perform the same calculation for Cu(111) on Ni(111).
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Critical misfit in thin film epitaxy - Example Problems
C. Determine the critical thickness as a function of the misfit for the following set of parameters. Y = 1 x 1011 Pa Gf=Gs = 3 x 1010 Pa vf =vs = 0.30 b = 0.3 nm = ro M = 2.1 x 1010 0.6 nm Cu/Ni 0.35 nm Cu/Ni more exact
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