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1. (a) The wurtzite crystal structure, with the in plane lattice parameter a, out of plane parameter c, and internal parameter u. (b) Layered hexagonal crystal structure. The difference between (a) and (b) is a that in (b) u is always 0.5.  

1. (a) The wurtzite crystal structure, with the in plane lattice parameter a, out of plane parameter c, and internal parameter u. (b) Layered hexagonal crystal structure. The difference between (a) and (b) is a that in (b) u is always 0.5.  

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Disordered multicomponent nitride thin film can be used for various applications. The focus of this Licentiate Thesis lies on the theoretical study of piezoelectric properties, phase stability and surface diffusion in multifunctional hard coating nitrides using density functional theory (DFT). Piezoelectric thin films show great promise for microe...

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... Strain in crystals is created by deformation and is described as relative lattice displacement. Stress can be applied equally on all sides of a body, which is called pressure, or in a single direction called uniaxial stress [46]. A stress that can bend or twist a body is known as shear stress. ...