Grain size effect on the dielectric nonlinearity of BaTiO3 ceramics

Ichiro Fujii, Michael Ugorek, Susan E. Trolier-McKinstry

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

The dielectric nonlinearity of BaTiO3 ceramics with grain sizes from 1.2 to 76 μm was investigated using the ac electric field dependence of the dielectric properties and the first order reversal curves (FORC) distribution. Defect dipoles in samples with large grains led to pinching of minor polarization-electric field hysteresis loops as well as a threshold field in the ac field dependence of the dielectric constant and loss. For samples with small grains, a sublinear ac field dependence was observed. The irreversible FORC distributions characterizing the responses showed two strong and narrow peaks for large-grained samples and a weak, broad peak centered near the origin for samples with small grains. As the grain size decreased, the reversible FORC distribution at zero-bias field increased. No grain size dependence of the reversible FORC distributions was observed at high dc electric fields. These results indicate that the grain size dependence of the small field dielectric constant is attributable to a domain wall contribution. Furthermore, the potential profile through which the domain walls travel changes from a landscape with shallow widely-spaced wells with deep local wells to one with deep widely-spaced wells with shallow local wells, as the grain size decreases.

Original languageEnglish (US)
Article number104116
JournalJournal of Applied Physics
Volume107
Issue number10
DOIs
StatePublished - May 15 2010

Fingerprint

grain size
nonlinearity
ceramics
curves
domain wall
electric fields
permittivity
dielectric loss
travel
dielectric properties
hysteresis
dipoles
thresholds
defects
polarization
profiles

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

@article{0728dcd7dfee4faa8f05cdb12c48aff0,
title = "Grain size effect on the dielectric nonlinearity of BaTiO3 ceramics",
abstract = "The dielectric nonlinearity of BaTiO3 ceramics with grain sizes from 1.2 to 76 μm was investigated using the ac electric field dependence of the dielectric properties and the first order reversal curves (FORC) distribution. Defect dipoles in samples with large grains led to pinching of minor polarization-electric field hysteresis loops as well as a threshold field in the ac field dependence of the dielectric constant and loss. For samples with small grains, a sublinear ac field dependence was observed. The irreversible FORC distributions characterizing the responses showed two strong and narrow peaks for large-grained samples and a weak, broad peak centered near the origin for samples with small grains. As the grain size decreased, the reversible FORC distribution at zero-bias field increased. No grain size dependence of the reversible FORC distributions was observed at high dc electric fields. These results indicate that the grain size dependence of the small field dielectric constant is attributable to a domain wall contribution. Furthermore, the potential profile through which the domain walls travel changes from a landscape with shallow widely-spaced wells with deep local wells to one with deep widely-spaced wells with shallow local wells, as the grain size decreases.",
author = "Ichiro Fujii and Michael Ugorek and Trolier-McKinstry, {Susan E.}",
year = "2010",
month = "5",
day = "15",
doi = "10.1063/1.3428423",
language = "English (US)",
volume = "107",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics Publising LLC",
number = "10",

}

Grain size effect on the dielectric nonlinearity of BaTiO3 ceramics. / Fujii, Ichiro; Ugorek, Michael; Trolier-McKinstry, Susan E.

In: Journal of Applied Physics, Vol. 107, No. 10, 104116, 15.05.2010.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Grain size effect on the dielectric nonlinearity of BaTiO3 ceramics

AU - Fujii, Ichiro

AU - Ugorek, Michael

AU - Trolier-McKinstry, Susan E.

PY - 2010/5/15

Y1 - 2010/5/15

N2 - The dielectric nonlinearity of BaTiO3 ceramics with grain sizes from 1.2 to 76 μm was investigated using the ac electric field dependence of the dielectric properties and the first order reversal curves (FORC) distribution. Defect dipoles in samples with large grains led to pinching of minor polarization-electric field hysteresis loops as well as a threshold field in the ac field dependence of the dielectric constant and loss. For samples with small grains, a sublinear ac field dependence was observed. The irreversible FORC distributions characterizing the responses showed two strong and narrow peaks for large-grained samples and a weak, broad peak centered near the origin for samples with small grains. As the grain size decreased, the reversible FORC distribution at zero-bias field increased. No grain size dependence of the reversible FORC distributions was observed at high dc electric fields. These results indicate that the grain size dependence of the small field dielectric constant is attributable to a domain wall contribution. Furthermore, the potential profile through which the domain walls travel changes from a landscape with shallow widely-spaced wells with deep local wells to one with deep widely-spaced wells with shallow local wells, as the grain size decreases.

AB - The dielectric nonlinearity of BaTiO3 ceramics with grain sizes from 1.2 to 76 μm was investigated using the ac electric field dependence of the dielectric properties and the first order reversal curves (FORC) distribution. Defect dipoles in samples with large grains led to pinching of minor polarization-electric field hysteresis loops as well as a threshold field in the ac field dependence of the dielectric constant and loss. For samples with small grains, a sublinear ac field dependence was observed. The irreversible FORC distributions characterizing the responses showed two strong and narrow peaks for large-grained samples and a weak, broad peak centered near the origin for samples with small grains. As the grain size decreased, the reversible FORC distribution at zero-bias field increased. No grain size dependence of the reversible FORC distributions was observed at high dc electric fields. These results indicate that the grain size dependence of the small field dielectric constant is attributable to a domain wall contribution. Furthermore, the potential profile through which the domain walls travel changes from a landscape with shallow widely-spaced wells with deep local wells to one with deep widely-spaced wells with shallow local wells, as the grain size decreases.

UR - http://www.scopus.com/inward/record.url?scp=77953004352&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77953004352&partnerID=8YFLogxK

U2 - 10.1063/1.3428423

DO - 10.1063/1.3428423

M3 - Article

VL - 107

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 10

M1 - 104116

ER -