A thermodynamic free energy function for potassium niobate

Linyun Liang; Y. L. Li; Long Qing Chen; S. Y. Hu; Guang Hong Lu

doi:10.1063/1.3081418

A thermodynamic free energy function for potassium niobate

Linyun Liang, Y. L. Li, Long Qing Chen, S. Y. Hu, Guang Hong Lu

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

34 Scopus citations

Abstract

A thermodynamic free energy function in the form of an eighth-order polynomial has been developed for bulk potassium niobate (KNbO₃), based on the Landau-Ginsburg-Devonshire phenomenological theory. The obtained free energy function successfully models the ferroelectric single domain (intrinsic) properties of KNbO₃, including the three sequential phase transition temperatures as well as polarizations, dielectric constants, and lattice constants along the whole ferroelectric temperature range. It is applicable to explaining and predicting the extrinsic contributions such as hydrostatic pressure on the bulks properties and substrate constraints on the thin films properties.

Original language	English (US)
Article number	072904
Journal	Applied Physics Letters
Volume	94
Issue number	7
DOIs	https://doi.org/10.1063/1.3081418
State	Published - 2009

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3081418

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abstract = "A thermodynamic free energy function in the form of an eighth-order polynomial has been developed for bulk potassium niobate (KNbO3), based on the Landau-Ginsburg-Devonshire phenomenological theory. The obtained free energy function successfully models the ferroelectric single domain (intrinsic) properties of KNbO3, including the three sequential phase transition temperatures as well as polarizations, dielectric constants, and lattice constants along the whole ferroelectric temperature range. It is applicable to explaining and predicting the extrinsic contributions such as hydrostatic pressure on the bulks properties and substrate constraints on the thin films properties.",

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AU - Li, Y. L.

AU - Chen, Long Qing

AU - Hu, S. Y.

AU - Lu, Guang Hong

PY - 2009

Y1 - 2009

N2 - A thermodynamic free energy function in the form of an eighth-order polynomial has been developed for bulk potassium niobate (KNbO3), based on the Landau-Ginsburg-Devonshire phenomenological theory. The obtained free energy function successfully models the ferroelectric single domain (intrinsic) properties of KNbO3, including the three sequential phase transition temperatures as well as polarizations, dielectric constants, and lattice constants along the whole ferroelectric temperature range. It is applicable to explaining and predicting the extrinsic contributions such as hydrostatic pressure on the bulks properties and substrate constraints on the thin films properties.

AB - A thermodynamic free energy function in the form of an eighth-order polynomial has been developed for bulk potassium niobate (KNbO3), based on the Landau-Ginsburg-Devonshire phenomenological theory. The obtained free energy function successfully models the ferroelectric single domain (intrinsic) properties of KNbO3, including the three sequential phase transition temperatures as well as polarizations, dielectric constants, and lattice constants along the whole ferroelectric temperature range. It is applicable to explaining and predicting the extrinsic contributions such as hydrostatic pressure on the bulks properties and substrate constraints on the thin films properties.

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JO - Applied Physics Letters

JF - Applied Physics Letters

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M1 - 072904

ER -

A thermodynamic free energy function for potassium niobate

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