Enhanced pyroelectric effect in self-supported films of BaTi O3 with polycrystalline macrodomains

Yahin Yvry; Vera Lyahovitskaya; Ilya Zon; Igor Lubomirsky; Ellen Wachtel; Alexander L. Roytburd

doi:10.1063/1.2730749

Enhanced pyroelectric effect in self-supported films of BaTi O3 with polycrystalline macrodomains

Yahin Yvry
, Vera Lyahovitskaya
, Ilya Zon
, Igor Lubomirsky
, Ellen Wachtel
, Alexander L. Roytburd

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

35 Scopus citations

Abstract

Self-supported films of nanocrystalline BaTi O3 exhibit a two orders of magnitude enhancement of the pyroelectric coefficient (≈1 μC cm2 K) with respect to the value measured for a single BaTi O3 crystal. The enhancement strongly depends on film geometry and appears only in buckled films where ferroelectric grains undergo self-organization into polycrystalline macrodomains. The authors posit that the enhancement of the pyroelectric effect is related to 90° polarization switching and is, therefore, similar in nature to an "extrinsic" piezoelectric effect.

Original language	English
Article number	172905
Journal	Applied Physics Letters
Volume	90
Issue number	17
DOIs	https://doi.org/10.1063/1.2730749
State	Published - 2007
Externally published	Yes

Bibliographical note

Funding Information:
The authors wish to acknowledge the U.S.-Israel Bi-national Science Foundation and Israel Science Foundation for funding this research. The authors express their appreciation to Oscar Stafsudd of UCLA for assistance with the measurements of the pyroelectric effect. One of the authors (A.L.R.) thanks NSF DMR Grant No. 0407517.

Funding

The authors wish to acknowledge the U.S.-Israel Bi-national Science Foundation and Israel Science Foundation for funding this research. The authors express their appreciation to Oscar Stafsudd of UCLA for assistance with the measurements of the pyroelectric effect. One of the authors (A.L.R.) thanks NSF DMR Grant No. 0407517.

Funders	Funder number
NSF DMR	0407517
U.S.–Israel Bi-National Science Foundation
Israel Science Foundation

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abstract = "Self-supported films of nanocrystalline BaTi O3 exhibit a two orders of magnitude enhancement of the pyroelectric coefficient (≈1 μC cm2 K) with respect to the value measured for a single BaTi O3 crystal. The enhancement strongly depends on film geometry and appears only in buckled films where ferroelectric grains undergo self-organization into polycrystalline macrodomains. The authors posit that the enhancement of the pyroelectric effect is related to 90° polarization switching and is, therefore, similar in nature to an {"}extrinsic{"} piezoelectric effect.",

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note = "Funding Information: The authors wish to acknowledge the U.S.-Israel Bi-national Science Foundation and Israel Science Foundation for funding this research. The authors express their appreciation to Oscar Stafsudd of UCLA for assistance with the measurements of the pyroelectric effect. One of the authors (A.L.R.) thanks NSF DMR Grant No. 0407517.",

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AU - Yvry, Yahin

AU - Lyahovitskaya, Vera

AU - Zon, Ilya

AU - Lubomirsky, Igor

AU - Wachtel, Ellen

AU - Roytburd, Alexander L.

N1 - Funding Information: The authors wish to acknowledge the U.S.-Israel Bi-national Science Foundation and Israel Science Foundation for funding this research. The authors express their appreciation to Oscar Stafsudd of UCLA for assistance with the measurements of the pyroelectric effect. One of the authors (A.L.R.) thanks NSF DMR Grant No. 0407517.

PY - 2007

Y1 - 2007

N2 - Self-supported films of nanocrystalline BaTi O3 exhibit a two orders of magnitude enhancement of the pyroelectric coefficient (≈1 μC cm2 K) with respect to the value measured for a single BaTi O3 crystal. The enhancement strongly depends on film geometry and appears only in buckled films where ferroelectric grains undergo self-organization into polycrystalline macrodomains. The authors posit that the enhancement of the pyroelectric effect is related to 90° polarization switching and is, therefore, similar in nature to an "extrinsic" piezoelectric effect.

AB - Self-supported films of nanocrystalline BaTi O3 exhibit a two orders of magnitude enhancement of the pyroelectric coefficient (≈1 μC cm2 K) with respect to the value measured for a single BaTi O3 crystal. The enhancement strongly depends on film geometry and appears only in buckled films where ferroelectric grains undergo self-organization into polycrystalline macrodomains. The authors posit that the enhancement of the pyroelectric effect is related to 90° polarization switching and is, therefore, similar in nature to an "extrinsic" piezoelectric effect.

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Enhanced pyroelectric effect in self-supported films of BaTi O3 with polycrystalline macrodomains

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