Pyroelectric and dielectric properties of ferroelectric films with interposed dielectric buffer layers

Espinal, Yomery; Kesim, Mehmet; Misirlioglu, I. B.; Trolier-McKinstry, Susan; Mantese, J. V.; Alpay, S. P.

doi:10.1063/1.4903993

Cited by 10 publications

(4 citation statements)

References 46 publications

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“…An ultrathin CFO layer is likely to be polarized according to the polarization state of BTO and, therefore, compensation charges provided by the Pt electrode should build at the top of the CFO surface. However, this mechanism is only energetically available for ultrathin dielectric layers 23 . A more likely alternative scenario would be that BTO (or CFO) free-charges migrate to the interface to compensate the net polarization at BTO interface.…”

Section: Resultsmentioning

confidence: 99%

Monolithic integration of room-temperature multifunctional BaTiO3-CoFe2O4 epitaxial heterostructures on Si(001)

Scigaj

Dix

Gàzquez

et al. 2016

Sci Rep

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The multifunctional (ferromagnetic and ferroelectric) response at room temperature that is elusive in single phase multiferroic materials can be achieved in a proper combination of ferroelectric perovskites and ferrimagnetic spinel oxides in horizontal heterostructures. In this work, lead-free CoFe2O4/BaTiO3 bilayers are integrated with Si(001) using LaNiO3/CeO2/YSZ as a tri-layer buffer. They present structural and functional properties close to those achieved on perovskite substrates: the bilayers are fully epitaxial with extremely flat surface, and exhibit robust ferromagnetism and ferroelectricity at room temperature.

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Section: Resultsmentioning

confidence: 99%

Monolithic integration of room-temperature multifunctional BaTiO3-CoFe2O4 epitaxial heterostructures on Si(001)

Scigaj

Dix

Gàzquez

et al. 2016

Sci Rep

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show abstract

“…The focus is now on routes to achieve even larger pyro electric and electrocaloric effects. These efforts are aided by advanced modelling approaches, which have explored, for example, the role of domain walls and domain structure 59,60 , film thickness and strain state [132][133][134] , thermalmismatch strains 135,136 , chemical and other gradients 137 , and multilayer structures 138,139 . One study clarified the relative importance of different contributions to the pyroelectric response 62 , including intrinsic (arising from the response of the polarization within the domains), extrinsic (arising from the temperature-driven change in the domain structure) and secondary (arising from a temperature-driven, piezoelectric-induced change in the polarization) pyroelectric effects in PbZr 1 − x Ti x O 3 (FIG.…”

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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“…The strongly coupled thermal and electrical responses in ferroelectric materials has spurred interest in how to use these effects for a wide variety of applications including infrared imaging [579], electron emission [580], cryogenic and solid state cooling [10,581], and waste-heat energy conversion [582,583]. Based on a strong theoretical foundation, researchers have explored computationally the effect of domain walls and domain structures [210,212], thin-film thickness and strain state [584][585][586][587][588][589], thermal-mismatch strains [590][591][592][593], chemical and other gradients [435,594], multilayer structures [344,595], and much more [428] on the electrocaloric and pyroelectric responses of these materials, and in general, it was found that the pyroelectric (electrocaloric) responses are enhanced close to phase/domain boundaries where large changes in polarization (entropy) can be driven by small changes in temperature (electric field).…”

Section: Thermal-based Applications Of Ferroelectricsmentioning

confidence: 99%

New modalities of strain-control of ferroelectric thin films

Damodaran¹,

Agar²,

Pandya³

et al. 2016

J. Phys.: Condens. Matter

113

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Ferroelectrics, with their spontaneous switchable electric polarization and strong coupling between their electrical, mechanical, thermal, and optical responses, provide functionalities crucial for a diverse range of applications. Over the past decade, there has been significant progress in epitaxial strain engineering of oxide ferroelectric thin films to control and enhance the nature of ferroelectric order, alter ferroelectric susceptibilities, and to create new modes of response which can be harnessed for various applications. This review aims to cover some of the most important discoveries in strain engineering over the past decade and highlight some of the new and emerging approaches for strain control of ferroelectrics. We discuss how these new approaches to strain engineering provide promising routes to control and decouple ferroelectric susceptibilities and create new modes of response not possible in the confines of conventional strain engineering. To conclude, we will provide an overview and prospectus of these new and interesting modalities of strain engineering helping to accelerate their widespread development and implementation in future functional devices.

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Pyroelectric and dielectric properties of ferroelectric films with interposed dielectric buffer layers

Cited by 10 publications

References 46 publications

Monolithic integration of room-temperature multifunctional BaTiO3-CoFe2O4 epitaxial heterostructures on Si(001)

Monolithic integration of room-temperature multifunctional BaTiO3-CoFe2O4 epitaxial heterostructures on Si(001)

Thin-film ferroelectric materials and their applications

New modalities of strain-control of ferroelectric thin films

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