Pyroelectric response of ferroelectric nanowires: Size effect and electric energy harvesting

Morozovska, Anna N.; Eliseev, Eugene A.; Svechnikov, George S.; Kalinin, Sergei V.

doi:10.1063/1.3474964

Cited by 76 publications

(53 citation statements)

References 24 publications

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“…Theoretical approaches based on thermodynamic, electrostatic, and statistical mechanics considerations have been used to understand the adiabatic temperature changes in polar solids 38 and asymmetric ferroelectric tunnel junctions, 80 as well as pyroelectric response of ferroelectric nanowires. 81 Although phase-field models have been developed for a number of materials systems that include ferroics and multiferroics, 82 only limited studies have considered their application to understand correlations between microstructural features and electrothermal properties. 83 In terms of atomistic approaches, there exist several methodologies based on first principles coupled with nonequilibrium molecular dynamics.…”

Section: Device and System Considerations For Materials Selection Andmentioning

confidence: 99%

Next-generation electrocaloric and pyroelectric materials for solid-state electrothermal energy interconversion

Mantese²,

et al. 2014

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Thin-film electrocaloric and pyroelectric electrothermal interconversion energy sources have recently emerged as viable means for primary and auxiliary solid-state cooling and power generation. Two significant advances have facilitated this development: (1) the formation of high-quality polymeric and ceramic thin films with figures of merit that project system-level performance as a large percentage of Carnot efficiency and (2) the ability of these newer materials to support larger electric fields, thereby permitting operation at higher voltages.This makes the power electronic architectures more favorable for thermal to electric interconversion. Current research targets to adequately address commercial device needs include reduction of parasitic losses, increases in mechanical robustness, and the ability to form nearly free-standing elements with thicknesses in the range of 1-10 m. This article describes the current state-ofthe-art materials, thermodynamic cycles, and device losses and points toward potential lines of research that would lead to substantially better figures of merit for electrothermal interconversion.Keywords: Material type-polymer (143), Material type-ceramic (121), Functionality-energy generation (189), , Material form-film (231), Transport-ferroelectricity (288) Fundamentals of ferroelectrics materials: Pyroelectrics and ElectrocaloricsIt has long been known that, when heated, materials such as the borosilicate tourmaline have the ability to attract objects such as pieces of feather, pollen, and cloth. This is due to the appearance of a surface charge in response to a temperature change. The history of this phenomenon, which is known as the pyroelectric effect (PE), was charted by Lang, 1 from its first description by Dielectrics whose structures possess both a unique axis of symmetry and lack a center of symmetry (i.e., that are "polar") display a spontaneous polarization (PS) and will exhibit a PE due to temperature-induced changes in PS. MRS BulletinThese variations in PS result in uncompensated charge appearing along surfaces that have a component normal to the polar axis, generating a net voltage across the dielectric. If the surfaces are provided with electrodes that are connected through an external circuit, this surface charge can cause a current to flow, potentially resulting in useful work. In the absence of an applied electric field or applied stress, the pyroelectric coefficient p(T) is defined as the rate of change of spontaneous polarization with temperature such that p(T) = dPS/dT. If electrodes are applied to the major faces perpendicular to the polar axis, as illustrated in Figure 1a, and the temperature is changed at a rate dT/dt, then the short-circuitThe converse of the pyroelectric effect is called the electrocaloric effect (ECE; see Figure 1b). Here, an electric field applied to a polar dielectric causes a change in temperature in the material. Conceptually, the ECE is somewhat harder to grasp than the PE, but it is analogous to the changes in temperature and en...

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Section: Device and System Considerations For Materials Selection Andmentioning

confidence: 99%

Next-generation electrocaloric and pyroelectric materials for solid-state electrothermal energy interconversion

Mantese²,

et al. 2014

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“…Recent studies include attempts at energy conversion using bulk crystals of relaxor materials 15 and ferroelectric nanowires. 16 Since most practical applications utilize "thick" ferroelectric films (generally in excess of 200 nm), it is important to understand pyroelectricity in these systems and explore new mechanisms for improving the pyroelectric coefficient. Epitaxial ferroelectric thin films which possess ferroelectric properties that are tunable with strain, composition, and temperature offer an exciting potential for such a study, but a comprehensive theoretical understanding is currently unavailable.…”

Section: Introductionmentioning

confidence: 99%

Pyroelectric properties of polydomain epitaxial Pb(Zr1−x,Tix)
Karthik
¹
,
Martin
²

2011
Phys. Rev. B

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The pyroelectric properties of polydomain epitaxial Pb(Zr 1-x ,Ti x )O 3 thin films are investigated using a Ginzburg-Landau-Devonshire thermodynamic model. We explore the three major contributions to pyroelectric response in thin films including intrinsic effects and previously neglected contributions such as extrinsic and secondary effects, to provide a complete picture of pyroelectric property development. The pyroelectric coefficient for epitaxial thin films is calculated as a function of strain, temperature, and composition for 0.5 ≤ x ≤ 1.0. We find that structural transitions driven by epitaxial strain can greatly enhance the pyroelectric coefficient and that extrinsic contributions due to temperature driven domain wall motion can significantly alter the intrinsic pyroelectric properties. Furthermore, we show that the pyroelectric coefficient at room temperature is maximized at the multicritical point between various polydomain phases and is also consistently high along the boundary between the c/ a/ c/ a and a 1 / a 2 / a 1 / a 2 polydomain phases. Additionally, we have investigated the impact of epitaxial strain on pyroelectric response in polydomain states and found that the extrinsic contribution from domain walls to the pyroelectric coefficient varies depending on the sign of the strain. Finally we examine the addition of secondary contributions to pyroelectricity that arise from thermal expansion in materials and provide insight into the effect of this contribution on the overall magnitude of response.2

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“…The presence of larger particles may interfere with the homogeneity of the liquid crystal, and thus destroy the orientation of the LC molecules, while the smaller particles lose their ferroelectric properties [7]. Previous work [9,10,[13][14][15][16] has shown that the preparation of ferroelectric nanoparticles is a difficult process. In recent years, one found new processes for the production of BaTiO 3 ferroelectric nanoparticles, including sol-gel method, hydrothermal method, molten salt method, mechanochemical synthesis or combustion synthesis [17,18].…”

Section: Methodsmentioning

confidence: 99%

Terahertz properties of liquid crystals doped with ferroelectric BaTiO₃ nanoparticles

et al. 2016

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Pyroelectric response of ferroelectric nanowires: Size effect and electric energy harvesting

Cited by 76 publications

References 24 publications

Next-generation electrocaloric and pyroelectric materials for solid-state electrothermal energy interconversion

Next-generation electrocaloric and pyroelectric materials for solid-state electrothermal energy interconversion

Pyroelectric properties of polydomain epitaxial Pb(Zr1−x,Tix)
Karthik
¹
,
Martin
²

2011
Phys. Rev. B

Terahertz properties of liquid crystals doped with ferroelectric BaTiO₃ nanoparticles

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Pyroelectric response of ferroelectric nanowires: Size effect and electric energy harvesting

Cited by 76 publications

References 24 publications

Next-generation electrocaloric and pyroelectric materials for solid-state electrothermal energy interconversion

Next-generation electrocaloric and pyroelectric materials for solid-state electrothermal energy interconversion

Pyroelectric properties of polydomain epitaxial Pb(Zr1−x,Tix)Karthik1, Martin2 2011Phys. Rev. B

Terahertz properties of liquid crystals doped with ferroelectric BaTiO3 nanoparticles

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Pyroelectric properties of polydomain epitaxial Pb(Zr1−x,Tix)
Karthik
¹
,
Martin
²

2011
Phys. Rev. B

Terahertz properties of liquid crystals doped with ferroelectric BaTiO₃ nanoparticles