Influence of superlattice and antiphase domain boundaries on dielectric loss in Ba[Mg1/3(Nbx/4Ta(4–x)/4)2/3]O3 ceramics
The Ba[Mg1/3(Nbx/4Ta(4–x)/4)2/3]O3 ceramics (x=0, 1, 2, 3, and 4) synthesized by a solid reaction method were sintered at 1650 °C for 9 h. The quality factor (Q,~1/tan ,tan &n...
The Ba[Mg1/3(Nbx/4Ta(4–x)/4)2/3]O3 ceramics (x=0, 1, 2, 3, and 4) synthesized by a solid reaction method were sintered at 1650 °C for 9 h. The quality factor (Q,~1/tan ,tan &n...
Faster H recovery in Pd nanoparticle layer based Gd switchable mirrors: Size-induced geometric and electronic effects
An investigation of the effect of the nanoparticle size in the Pd overlayer on the hydrogen-induced changes in the Gd switchable mirrors is reported in the present study. Deposition of a 10 ...
An investigation of the effect of the nanoparticle size in the Pd overlayer on the hydrogen-induced changes in the Gd switchable mirrors is reported in the present study. Deposition of a 10 ...
Polarization enhancement in two- and three-component ferroelectric superlattices
Appl. Phys. Lett. 87, 102906 (2005); doi:10.1063/1.2042630
Published 2 September 2005
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Composition-dependent structural and polar properties of epitaxial short-period CaTiO3/-SrTiO3/BaTiO3 superlattices grown on a SrTiO3 substrate are investigated with first-principles density-functional theory computational techniques. Polarization enhancement with respect to bulk tetragonal BaTiO3 is found for two- and three-component superlattices with a BaTiO3 concentration of more than 30%. Individual BaTiO3 layer thickness is identified as an important factor governing the polarization improvement. In addition, the degree of inversion-symmetry breaking in three-component superlattices can be controlled by varying the thicknesses of the component layers. The flexibility allowed within this large family of structures makes them highly suitable for various applications in modern nanoelectromechanical devices.
©2005 American Institute of Physics
| History: | Received 20 May 2005; accepted 27 July 2005; published 2 September 2005 |
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http://link.aip.org/link/?APPLAB/87/102906/1 |
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