Polarization reversal and backswitching dynamics in epitaxial BaTi O 3 thin films

Jianheng Li; Pao Tai Lin; B. W. Wessels

doi:10.1063/1.3212975

Polarization reversal and backswitching dynamics in epitaxial BaTi O ₃ thin films

Jianheng Li^*, Pao Tai Lin, B. W. Wessels

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

Polarization switching dynamics in polydomain epitaxial barium titanate (BaTi O₃) thin films were investigated over the temperature range of 293-363 K. To determine domain dynamics, the transient response of the linear electro-optic effect was measured as a function of bias field under pulsed excitation and temperature. Upon removal of the bias pulse, domain backswitching is observed, which is described by the Kohlrausch-Williams-Watts (KWW) extended exponential function in time. From the KWW kinetic parameter 〈τ〉 and its temperature and field dependences, the activation field and nucleation energy for polarization reversal are determined. The measured thermal energy barrier for nucleation is in the range of 0.1 eV-0.3 eV and decreases with the electric field. These values are in good agreement with those recently obtained in molecular dynamics simulation studies of domain nucleation and growth in BaTi O₃.

Original language	English (US)
Article number	054113
Journal	Journal of Applied Physics
Volume	106
Issue number	5
DOIs	https://doi.org/10.1063/1.3212975
State	Published - 2009

Funding

This work was supported by the National Science Foundation through NSF Grant No. DMR-0605292. This work made use of the Materials Processing and Crystal Growth Facility supported by the National Science Foundation at the Materials Research Center of Northwestern University under Award No. DMR-0076097.

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1063/1.3212975

Cite this

@article{370b5c4654e846e2a2e0dba74aa69f16,

title = "Polarization reversal and backswitching dynamics in epitaxial BaTi O 3 thin films",

abstract = "Polarization switching dynamics in polydomain epitaxial barium titanate (BaTi O3) thin films were investigated over the temperature range of 293-363 K. To determine domain dynamics, the transient response of the linear electro-optic effect was measured as a function of bias field under pulsed excitation and temperature. Upon removal of the bias pulse, domain backswitching is observed, which is described by the Kohlrausch-Williams-Watts (KWW) extended exponential function in time. From the KWW kinetic parameter 〈τ〉 and its temperature and field dependences, the activation field and nucleation energy for polarization reversal are determined. The measured thermal energy barrier for nucleation is in the range of 0.1 eV-0.3 eV and decreases with the electric field. These values are in good agreement with those recently obtained in molecular dynamics simulation studies of domain nucleation and growth in BaTi O3.",

author = "Jianheng Li and Lin, {Pao Tai} and Wessels, {B. W.}",

note = "Funding Information: This work was supported by the National Science Foundation through NSF Grant No. DMR-0605292. This work made use of the Materials Processing and Crystal Growth Facility supported by the National Science Foundation at the Materials Research Center of Northwestern University under Award No. DMR-0076097.",

year = "2009",

doi = "10.1063/1.3212975",

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T1 - Polarization reversal and backswitching dynamics in epitaxial BaTi O 3 thin films

AU - Li, Jianheng

AU - Lin, Pao Tai

AU - Wessels, B. W.

N1 - Funding Information: This work was supported by the National Science Foundation through NSF Grant No. DMR-0605292. This work made use of the Materials Processing and Crystal Growth Facility supported by the National Science Foundation at the Materials Research Center of Northwestern University under Award No. DMR-0076097.

PY - 2009

Y1 - 2009

N2 - Polarization switching dynamics in polydomain epitaxial barium titanate (BaTi O3) thin films were investigated over the temperature range of 293-363 K. To determine domain dynamics, the transient response of the linear electro-optic effect was measured as a function of bias field under pulsed excitation and temperature. Upon removal of the bias pulse, domain backswitching is observed, which is described by the Kohlrausch-Williams-Watts (KWW) extended exponential function in time. From the KWW kinetic parameter 〈τ〉 and its temperature and field dependences, the activation field and nucleation energy for polarization reversal are determined. The measured thermal energy barrier for nucleation is in the range of 0.1 eV-0.3 eV and decreases with the electric field. These values are in good agreement with those recently obtained in molecular dynamics simulation studies of domain nucleation and growth in BaTi O3.

AB - Polarization switching dynamics in polydomain epitaxial barium titanate (BaTi O3) thin films were investigated over the temperature range of 293-363 K. To determine domain dynamics, the transient response of the linear electro-optic effect was measured as a function of bias field under pulsed excitation and temperature. Upon removal of the bias pulse, domain backswitching is observed, which is described by the Kohlrausch-Williams-Watts (KWW) extended exponential function in time. From the KWW kinetic parameter 〈τ〉 and its temperature and field dependences, the activation field and nucleation energy for polarization reversal are determined. The measured thermal energy barrier for nucleation is in the range of 0.1 eV-0.3 eV and decreases with the electric field. These values are in good agreement with those recently obtained in molecular dynamics simulation studies of domain nucleation and growth in BaTi O3.

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