Giant pyroelectric coefficient determined from the frequency dependence of the pyroelectric signal generated by epitaxial Pb(Zr0.2Ti0.8)O3 layers grown on single crystal SrTiO3 substrates

Botea, Mihaela; Iuga, A.; Pintilie, L.

doi:10.1063/1.4838035

Cited by 23 publications

(18 citation statements)

References 35 publications

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“…This result suggests to us that domain walls are pinned at all frequencies. Recently, Botea et al [34] reported a pyroelectric coefficient (∼1.9 × 10 −3 Cm −2 K −1 , about 10 times higher that our measured values) of PZT epitaxial layers grown on STO substrates. The 90°ferroelectric domains and the compressive misfit strain are suggested to be causes for this giant value.…”

Section: Resultscontrasting

confidence: 52%

Secondary effects in wide frequency range measurements of the pyroelectric coefficient ofBa0.6Sr0.4TiO3andPbZr0.2<

et al. 2014

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We describe measurements of the pyroelectric coefficient of epitaxial layers of Ba 0.6 Sr 0.4 TiO 3 (BST) and PbZr 0.2 Ti 0.8 O 3 (PZT) using a modulated laser as the heat source in the frequency range 1 Hz to 10 MHz. The pyroelectric coefficient is also measured as a function of applied static electric field and for films grown on SrTiO 3 , DyScO 3 , and GdScO 3 substrates. The heat diffusion equation is solved in cylindrical coordinates for the temperature field in a multilayer sample heated by a Gaussian-shaped laser beam. The secondary contribution to the pyroelectric effect caused by piezoelectric effects and in-plane thermal expansion is revealed by the difference between the pyroelectric coefficients at high and low frequencies. The secondary pyroelectric effect has the same dependence on applied field as the pyroelectric coefficient. The magnitude of the secondary effect changes with heating frequency because of changing mechanical conditions, but the pyroelectric coefficient has no other frequency dependence between 1 Hz and 10 MHz. The secondary effect is approximately 15% and 20% of the total pyroelectric response for PZT and BST films, respectively.

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Section: Resultscontrasting

confidence: 52%

Secondary effects in wide frequency range measurements of the pyroelectric coefficient ofBa0.6Sr0.4TiO3andPbZr0.2<

et al. 2014

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“…For the 600 nm thick AlN layer the value of T is slightly lower, of 193 s. Therefore, the situation (ω T ) 2 1 is fulfilled. For the frequency range where (ω e ) 2 1 ( e is the electrical time constant, given by the product RC with R resistance and C capacitance of the pyroelectric element) the signal should be frequency independent and given by [31,34]:…”

Section: Discussionmentioning

confidence: 99%

“…The estimations will be made using the same procedure as in Ref. [31], thus including the effect of the substrate in the thermal time constant of the AlN layer. The quantities relevant for calculations are: density, specific heat and thermal conductivity.…”

Section: Discussionmentioning

confidence: 99%

Electric and pyroelectric properties of AlN thin films deposited by reactive magnetron sputtering on Si substrate

Stan

Botea

Boni

et al. 2015

Applied Surface Science

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“…Direct and indirect methods have been carefully compared, and although they can provide similar values for bulk materials, the results often significantly differ for clamped thin films 148,149 . However, several new (or at least refined) measurement techniques for pyroelectric and electrocaloric effects have been reported in the past few years and will probably lead to new discoveries [149][150][151][152][153] .…”

Section: Thermal-based Applicationsmentioning

confidence: 99%

Thin-film ferroelectric materials and their applications

2016

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| Ferroelectric materials, because of their robust spontaneous electrical polarization, are widely used in various applications. Recent advances in modelling, synthesis and characterization techniques are spurring unprecedented advances in the study of these materials. In this Review, we focus on thin-film ferroelectric materials and, in particular, on the possibility of controlling their properties through the application of strain engineering in conventional and unconventional ways. We explore how the study of ferroelectric materials has expanded our understanding of fundamental effects, enabled the discovery of novel phases and physics, and allowed unprecedented control of materials properties. We discuss several exciting possibilities for the development of new devices, including those in electronic, thermal and photovoltaic applications, and transduction sensors and actuators. We conclude with a brief survey of the different directions that the field may expand to over the coming years. REVIEWS NATURE REVIEWS | MATERIALS VOLUME 2 | ARTICLE NUMBER 16087 | 1 © 2 0 1 7 M a c m i l l a n P u b l i s h e r s L i m i t e d , p a r t o f S p r i n g e r N a t u r e . A l l r i g h t s r e s e r v e d .

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Giant pyroelectric coefficient determined from the frequency dependence of the pyroelectric signal generated by epitaxial Pb(Zr0.2Ti0.8)O3 layers grown on single crystal SrTiO3 substrates

Cited by 23 publications

References 35 publications

Secondary effects in wide frequency range measurements of the pyroelectric coefficient ofBa0.6Sr0.4TiO3andPbZr0.2<

Secondary effects in wide frequency range measurements of the pyroelectric coefficient ofBa0.6Sr0.4TiO3andPbZr0.2<

Electric and pyroelectric properties of AlN thin films deposited by reactive magnetron sputtering on Si substrate

Thin-film ferroelectric materials and their applications

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