1. 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

2. Critical misfit in thin film epitaxy - Example Problems

3. Critical misfit in thin film epitaxy - Example Problems
(B) Perform the same calculation for Cu(111) on Ni(111).

4. 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