Dielectric properties and energy storage capability of antiferroelectric Pb0.92La0.08Zr0.95Ti0.05O3 film-on-foil capacitors

Ma, Beihai; Kwon, Do-Kyun; Narayanan, Manoj; Balachandran, U.

doi:10.1557/jmr.2009.0349

Cited by 107 publications

(79 citation statements)

References 11 publications

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“…For instance, the Pnma state in ABO 3 perovskites is known to possess antipolar motions of its A cations and recent studies found that it can also adopt the double polarization-vs.-electric field hysteresis loop in some materials 13,14 that is characteristics of antiferroelectrics 15 -therefore suggesting that Pnma states in some perovskites can hold promise towards the design of energy storage devices with high energy densities and efficiencies. [16][17][18][19][20][21][22] Interestingly, all the aforementioned works on trilinear energetic couplings have been aimed at revealing and understanding resulting static properties. In other words, the effect of these original trilinear couplings on dynamics have been left out so far and are thus basically unknown, to the best of our knowledge.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of antipolar distortions

2017

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Materials possessing antipolar cation motions are currently receiving a lot of attention because they are fundamentally intriguing while being technologically promising. Most studies devoted to these complex materials have focused on their static properties or on their zone-center phonons. As a result, some important dynamics of antipolar cation distortions, such as the temperature behavior of their phonon frequencies, have been much less investigated, despite the possibility to exhibit unusual features. Here, we report the results and analysis of atomistic simulations revealing and explaining such dynamics for BiFeO 3 bulks being subject to hydrostatic pressure. It is first predicted that cooling such material yields the following phase transition sequence: the cubic paraelectric Pm3m state at high temperature, followed by an intermediate phase possessing long-range-ordered in-phase oxygen octahedral tiltings, and then the Pnma state that is known to possess antipolar cation motions in addition to in-phase and antiphase oxygen octahedral tiltings. Antipolar cation modes are found to all have high phonon frequencies that are independent of temperature in the paraelectric phase. On the other hand and in addition to antipolar cation modes increasing in number, some phonons possessing antipolar cation character are rather soft in the intermediate and Pnma states. Analysis of our data combined with the development of a simple model reveals that such features originate from a dynamical mixing between pure antipolar cation phonons and fluctuations of oxygen octahedral tiltings, as a result of a specific trilinear energetic coupling. The developed model can also be easily applied to predict dynamics of antipolar cation motions for other possible structural paths bringing Pm3m to Pnma states.

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Section: Introductionmentioning

confidence: 99%

Dynamics of antipolar distortions

2017

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“…Antiferroelectrics (AFEs) form a class of important materials that are currently receiving a lot of attention, mainly because they are promising candidates for obtaining high-density energy storage [1][2][3][4][5] . They are also fundamentally challenging and interesting, as e.g.…”

Section: Introductionmentioning

confidence: 99%

Atomistic mechanism leading to complex antiferroelectric and incommensurate perovskites

et al. 2016

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An atomic interaction is identified in all perovskite compounds, such as ABO 3 oxides, that can potentially result in unconventional structures. The term is harmonic in nature and couples the motions of the A cations with the rotations of the oxygen octahedra in the perovskite lattice.When strong enough, this coupling leads to hybrid normal modes that present both (anti)polar and rotational characters, which are keys to understand a variety of exotic phases. For example, we show that not only does this new coupling explain the long-period soft phonons characterizing prototype antiferroelectric PbZrO 3 , but it also provides us with an unified description of the complex antipolar structures of a variety of perovskites, including the possible occurrence of incommensurate phases.This coupling is further demonstrated to result, in the continuum limit, in a energy invariant adopting an analytical form that has been previously overlooked, to the best of our knowledge.

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“…This is reflected in the energy density values already found in thin film electroceramic capacitors. These are typically $15 Jcc À1 or greater, [13][14][15][16] with energy densities as high as 53 Jcc À1 reported 17 (compare with bulk values given above).…”

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confidence: 96%

Increasing recoverable energy storage in electroceramic capacitors using “dead-layer” engineering

McMillen¹,

Douglas²,

Correia³

et al. 2012

Applied Physics Letters

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The manner in which ultrathin films of alumina, deposited at the dielectric-electrode interface, affect the recoverable energy density associated with (BiFeO3)0.6–(SrTiO3)0.4 (BFST) thin film capacitors has been characterised. Approximately 6 nm of alumina on 400 nm of BFST increases the maximum recoverable energy of the system by around 30% from ∼13 Jcc−1 to ∼17 Jcc−1. Essentially, the alumina acts in the same way as a naturally present parasitic “dead-layer,” distorting the polarisation-field response such that the ultimate polarisation associated with the BFST is pushed to higher values of electric field. The work acts as a proof-of-principle to illustrate how the design of artificial interfacial dielectric “dead-layers” can increase energy densities in simple dielectric capacitors, allowing them to compete more generally with other energy storage technologies.

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Dielectric properties and energy storage capability of antiferroelectric Pb_0.92La_0.08Zr_0.95Ti_0.05O₃ film-on-foil capacitors

Cited by 107 publications

References 11 publications

Dynamics of antipolar distortions

Dynamics of antipolar distortions

Atomistic mechanism leading to complex antiferroelectric and incommensurate perovskites

Increasing recoverable energy storage in electroceramic capacitors using “dead-layer” engineering

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