科研之友
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摘要
The elastic stiffness (C-11) and piezoelectric coefficient (e(11)) of BaTiO3 thin films are investigated based on first-principles calculations. It is found that the compressive stiffness of BaTiO3 film is larger than its tensile stiffness. The elastic and piezoelectric properties of films are both size dependence: elastic stiffness is enhanced with decreasing film thickness, while the piezoelectricity is weakened.
