Duan, Yifeng and Wang, Chunmei and Tang, Gang and Chen, Changqing (2009) Influence of Uniaxial Tensile Stress on the Mechanical and Piezoelectric Properties of Short-period Ferroelectric Superlattice. Nanoscale Research Letters, 5 (2). pp. 448-452.
Official URL: http://www.springerlink.com/content/34kgn171620584...
Tetragonal ferroelectric/ferroelectric BaTiO3/PbTiO3 superlattice under uniaxial tensile stress along the c axis is investigated from first principles. We show that the calculated ideal tensile strength is 6.85 GPa and that the superlattice under the loading of uniaxial tensile stress becomes soft along the nonpolar axes. We also find that the appropriately applied uniaxial tensile stress can significantly enhance the piezoelectricity for the superlattice, with piezoelectric coefficient d 33 increasing from the ground state value by a factor of about 8, reaching 678.42 pC/N. The underlying mechanism for the enhancement of piezoelectricity is discussed.
|Uncontrolled Keywords:||Mechanical property - Piezoelectricity - Ferroelectric superlattice|
|Subjects:||Physical Science > Nanophysics|
Engineering > Nanotechnology applications in mechanical engineering
Engineering > Nanotechnology applications in aeronautics & astronautics
Material Science > Nanostructured materials
|Deposited By:||Lesley Tobin|
|Deposited On:||22 Mar 2010 15:17|
|Last Modified:||22 Mar 2010 15:17|
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