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

A. Pramanick; S. O. Diallo; O. Delaire; S. Calder; A. D. Christianson; X. L. Wang; J. A. Fernandez-Baca

doi:10.1103/PhysRevB.88.180101

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

A. Pramanick, S. O. Diallo, O. Delaire, S. Calder, A. D. Christianson, X. L. Wang, J. A. Fernandez-Baca

Research output: Journal Publications and Reviews › RGC 22 - Publication in policy or professional journal

5 Citations (Scopus)

29 Downloads (CityUHK Scholars)

Abstract

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.

Original language	English
Article number	180101
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	88
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.88.180101
Publication status	Published - 15 Nov 2013

Publisher's Copyright Statement

COPYRIGHT TERMS OF DEPOSITED FINAL PUBLISHED VERSION FILE: 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), [180101]. https://doi.org/10.1103/PhysRevB.88.180101. The copyright of this article is owned by American Physical Society.

Access Output

10.1103/PhysRevB.88.180101

5863155.pdfFinal Published version, 1.55 MB

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

@article{cbee117a1807421d9f4873a2adff7422,

title = "Origins of large enhancement in electromechanical coupling for nonpolar directions in ferroelectric BaTiO3",

abstract = "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. {\textcopyright} 2013 American Physical Society.",

author = "A. Pramanick and Diallo, {S. O.} and O. Delaire and S. Calder and Christianson, {A. D.} and Wang, {X. L.} and Fernandez-Baca, {J. A.}",

year = "2013",

month = nov,

day = "15",

doi = "10.1103/PhysRevB.88.180101",

language = "English",

volume = "88",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "0163-1829",

publisher = "American Physical Society",

number = "18",

}

TY - JOUR

T1 - Origins of large enhancement in electromechanical coupling for nonpolar directions in ferroelectric BaTiO3

AU - Pramanick, A.

AU - Diallo, S. O.

AU - Delaire, O.

AU - Calder, S.

AU - Christianson, A. D.

AU - Wang, X. L.

AU - Fernandez-Baca, J. A.

PY - 2013/11/15

Y1 - 2013/11/15

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84888323733&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84888323733&origin=recordpage

U2 - 10.1103/PhysRevB.88.180101

DO - 10.1103/PhysRevB.88.180101

M3 - RGC 22 - Publication in policy or professional journal

SN - 0163-1829

VL - 88

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 18

M1 - 180101

ER -