Displacement charge patterns and ferroelectric domain wall dynamics studied by in-situ TEM

A. Krishnan, Michael Treacy, M. E. Bisher, P. Chandra, P. B. Littlewood

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We have observed the growth of domains in ferroelectric barium titanate and potassium niobate using a transmission electron microscope. When domains move in response to electric fields we see a scaling effect where the fine scale domain structure is activated first, followed by larger length-scale patterns. Curvature and tilting of domain walls leads to local uncompensated displacement charge and external fields can interact with these charged walls. In this paper, we posit that the presence of displacement charge on domain walls is important for polarization switching. Charge-neutral domain configurations are in a lower energy state and are harder to switch. We argue that the number of charge-neutral, low energy domain configurations can increase with time. This mechanism provides an intrinsic contribution to ferroelectric fatigue.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium - Proceedings
PublisherMaterials Research Society
Pages161-166
Number of pages6
Volume596
StatePublished - 2000
Externally publishedYes
EventFerroelectric Thin Films VIII - Boston, MA, USA
Duration: Nov 29 1999Dec 2 1999

Other

OtherFerroelectric Thin Films VIII
CityBoston, MA, USA
Period11/29/9912/2/99

Fingerprint

Domain walls
Ferroelectric materials
Transmission electron microscopy
Barium titanate
Electron energy levels
Potassium
Electron microscopes
Switches
Electric fields
Fatigue of materials
Polarization
potassium niobate

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Krishnan, A., Treacy, M., Bisher, M. E., Chandra, P., & Littlewood, P. B. (2000). Displacement charge patterns and ferroelectric domain wall dynamics studied by in-situ TEM. In Materials Research Society Symposium - Proceedings (Vol. 596, pp. 161-166). Materials Research Society.

Displacement charge patterns and ferroelectric domain wall dynamics studied by in-situ TEM. / Krishnan, A.; Treacy, Michael; Bisher, M. E.; Chandra, P.; Littlewood, P. B.

Materials Research Society Symposium - Proceedings. Vol. 596 Materials Research Society, 2000. p. 161-166.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Krishnan, A, Treacy, M, Bisher, ME, Chandra, P & Littlewood, PB 2000, Displacement charge patterns and ferroelectric domain wall dynamics studied by in-situ TEM. in Materials Research Society Symposium - Proceedings. vol. 596, Materials Research Society, pp. 161-166, Ferroelectric Thin Films VIII, Boston, MA, USA, 11/29/99.
Krishnan A, Treacy M, Bisher ME, Chandra P, Littlewood PB. Displacement charge patterns and ferroelectric domain wall dynamics studied by in-situ TEM. In Materials Research Society Symposium - Proceedings. Vol. 596. Materials Research Society. 2000. p. 161-166
Krishnan, A. ; Treacy, Michael ; Bisher, M. E. ; Chandra, P. ; Littlewood, P. B. / Displacement charge patterns and ferroelectric domain wall dynamics studied by in-situ TEM. Materials Research Society Symposium - Proceedings. Vol. 596 Materials Research Society, 2000. pp. 161-166
@inproceedings{fe87328d0e2648788c0fe760daae2a22,
title = "Displacement charge patterns and ferroelectric domain wall dynamics studied by in-situ TEM",
abstract = "We have observed the growth of domains in ferroelectric barium titanate and potassium niobate using a transmission electron microscope. When domains move in response to electric fields we see a scaling effect where the fine scale domain structure is activated first, followed by larger length-scale patterns. Curvature and tilting of domain walls leads to local uncompensated displacement charge and external fields can interact with these charged walls. In this paper, we posit that the presence of displacement charge on domain walls is important for polarization switching. Charge-neutral domain configurations are in a lower energy state and are harder to switch. We argue that the number of charge-neutral, low energy domain configurations can increase with time. This mechanism provides an intrinsic contribution to ferroelectric fatigue.",
author = "A. Krishnan and Michael Treacy and Bisher, {M. E.} and P. Chandra and Littlewood, {P. B.}",
year = "2000",
language = "English (US)",
volume = "596",
pages = "161--166",
booktitle = "Materials Research Society Symposium - Proceedings",
publisher = "Materials Research Society",

}

TY - GEN

T1 - Displacement charge patterns and ferroelectric domain wall dynamics studied by in-situ TEM

AU - Krishnan, A.

AU - Treacy, Michael

AU - Bisher, M. E.

AU - Chandra, P.

AU - Littlewood, P. B.

PY - 2000

Y1 - 2000

N2 - We have observed the growth of domains in ferroelectric barium titanate and potassium niobate using a transmission electron microscope. When domains move in response to electric fields we see a scaling effect where the fine scale domain structure is activated first, followed by larger length-scale patterns. Curvature and tilting of domain walls leads to local uncompensated displacement charge and external fields can interact with these charged walls. In this paper, we posit that the presence of displacement charge on domain walls is important for polarization switching. Charge-neutral domain configurations are in a lower energy state and are harder to switch. We argue that the number of charge-neutral, low energy domain configurations can increase with time. This mechanism provides an intrinsic contribution to ferroelectric fatigue.

AB - We have observed the growth of domains in ferroelectric barium titanate and potassium niobate using a transmission electron microscope. When domains move in response to electric fields we see a scaling effect where the fine scale domain structure is activated first, followed by larger length-scale patterns. Curvature and tilting of domain walls leads to local uncompensated displacement charge and external fields can interact with these charged walls. In this paper, we posit that the presence of displacement charge on domain walls is important for polarization switching. Charge-neutral domain configurations are in a lower energy state and are harder to switch. We argue that the number of charge-neutral, low energy domain configurations can increase with time. This mechanism provides an intrinsic contribution to ferroelectric fatigue.

UR - http://www.scopus.com/inward/record.url?scp=0033710405&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033710405&partnerID=8YFLogxK

M3 - Conference contribution

VL - 596

SP - 161

EP - 166

BT - Materials Research Society Symposium - Proceedings

PB - Materials Research Society

ER -