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Origins of large enhancement in electromechanical coupling for nonpolar directions in ferroelectric BaTiO3

Publication ,  Journal Article
Pramanick, A; Diallo, SO; Delaire, O; Calder, S; Christianson, AD; Wang, XL; Fernandez-Baca, JA
Published in: Physical Review B - Condensed Matter and Materials Physics
November 15, 2013

The origins of enhanced piezoelectric coupling along nonpolar crystallographic directions in ferroelectric BaTiO3 are investigated using in situ neutron spectroscopy. It is observed that an electric field applied away from the equilibrium polarization direction causes a stiffening of the transverse acoustic (TA) phonon branch and consequently increases interaction between the TA and the transverse optic soft mode for a range of wave vectors extending from the Brillouin zone center. This provides a direct lattice dynamics mechanism for enhanced electromechanical coupling, and could act as a guide for designing improved piezoelectric materials. © 2013 American Physical Society.

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Published In

Physical Review B - Condensed Matter and Materials Physics

DOI

EISSN

1550-235X

ISSN

1098-0121

Publication Date

November 15, 2013

Volume

88

Issue

18

Related Subject Headings

  • Fluids & Plasmas
  • 09 Engineering
  • 03 Chemical Sciences
  • 02 Physical Sciences
 

Citation

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Pramanick, A., Diallo, S. O., Delaire, O., Calder, S., Christianson, A. D., Wang, X. L., & Fernandez-Baca, J. A. (2013). Origins of large enhancement in electromechanical coupling for nonpolar directions in ferroelectric BaTiO3. Physical Review B - Condensed Matter and Materials Physics, 88(18). https://doi.org/10.1103/PhysRevB.88.180101
Pramanick, A., S. O. Diallo, O. Delaire, S. Calder, A. D. Christianson, X. L. Wang, and J. A. Fernandez-Baca. “Origins of large enhancement in electromechanical coupling for nonpolar directions in ferroelectric BaTiO3.” Physical Review B - Condensed Matter and Materials Physics 88, no. 18 (November 15, 2013). https://doi.org/10.1103/PhysRevB.88.180101.
Pramanick A, Diallo SO, Delaire O, Calder S, Christianson AD, Wang XL, et al. Origins of large enhancement in electromechanical coupling for nonpolar directions in ferroelectric BaTiO3. Physical Review B - Condensed Matter and Materials Physics. 2013 Nov 15;88(18).
Pramanick, A., et al. “Origins of large enhancement in electromechanical coupling for nonpolar directions in ferroelectric BaTiO3.” Physical Review B - Condensed Matter and Materials Physics, vol. 88, no. 18, Nov. 2013. Scopus, doi:10.1103/PhysRevB.88.180101.
Pramanick A, Diallo SO, Delaire O, Calder S, Christianson AD, Wang XL, Fernandez-Baca JA. Origins of large enhancement in electromechanical coupling for nonpolar directions in ferroelectric BaTiO3. Physical Review B - Condensed Matter and Materials Physics. 2013 Nov 15;88(18).

Published In

Physical Review B - Condensed Matter and Materials Physics

DOI

EISSN

1550-235X

ISSN

1098-0121

Publication Date

November 15, 2013

Volume

88

Issue

18

Related Subject Headings

  • Fluids & Plasmas
  • 09 Engineering
  • 03 Chemical Sciences
  • 02 Physical Sciences