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Stress Effect on the Pyroelectric Properties of Lead Titanate Thin Films

Haitao Huang, Chang Q. Sun, Tianshu Zhang, Zhu Hong, Joo Tien Oh, Peter Hing

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Abstract

In the application of thin ferroelectric films to IR sensors, problems may arise to affect the sensitivities of the devices. The effects to influence the pyroelectric properties can be mainly categorized into two groups. One is the intrinsic effect due to the reduction in grain size. The other is the effect caused by residual stress. In this paper the stress effect on the pyroelectric properties of PbTiO 3 thin films will be studied by using the Landau-Ginsburg-Devonshire (LGD) phenomenological theory. It is found that a compressive stress increases the figure of merit while a tensile stress increases the pyroelectric coefficient for the films with the polarization vectors normal to the surface.

About this research paper

What this paper is about

In the application of thin ferroelectric films to IR sensors, problems may arise to affect the sensitivities of the devices. The effects to influence the pyroelectric properties can be mainly categorized into two groups. One is the intrinsic effect due to the reduction in grain size. The other is the effect caused by residual stress. In this paper the stress effect on the pyroelectric properties of PbTiO 3 thin films will be studied by using the Landau-Ginsburg-Devonshire (LGD) phenomenological theory. It is found that a compressive stress increases the figure of merit while a tensile stress increases the pyroelectric coefficient for the films with the polarization vectors normal to the surface.

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OpenAlex reports 10 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

In the application of thin ferroelectric films to IR sensors, problems may arise to affect the sensitivities of the devices. The effects to influence the pyroelectric properties can be mainly categorized into two groups. One is the intrinsic effect due to the reduction in grain size. The other is the effect caused by residual stress. In this paper the stress effect on the pyroelectric properties of PbTiO 3 thin films will be studied by using the Landau-Ginsburg-Devonshire (LGD) phenomenological theory. It is found that a compressive stress increases the figure of merit while a tensile stress increases the pyroelectric coefficient for the films with the polarization vectors normal to the surface.

Key concepts: Pyroelectricity, Materials science, Lead titanate, Figure of merit, Ferroelectricity, Residual stress, Thin film, Polarization (electrochemistry)

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