Atomic-scale evolution of modulated phases at the ferroelectric–antiferroelectric morphotropic phase boundary controlled by flexoelectric interaction

Borisevich, Albina Y.; Eliseev, Eugene A.; Morozovska, Anna N.; Cheng, Ching-Jung; Lin, Jiunn‐Yuan; Chu, Ying Hao; Kan, Daisuke; Takeuchi, Ichiro; Valanoor, Nagarajan; Kalinin, Sergei V.

doi:10.1038/ncomms1778

Cited by 152 publications

(131 citation statements)

References 62 publications

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“…This recalls a recent study by Borisevich et al 31 on the bridging phase between a ferroelectric and antiferroelectric state in modified BiFeO 3 , where this phase was treated as a manifestation of flexoelectricity. The framework presented above may also be applied to this system.…”

Section: Resultssupporting

confidence: 75%

“…The remaining key parts of the whole scenario are the repulsive and attractive biquadratic couplings, which suppress the appearance of the spontaneous polarization and induce the anti-phase octahedral rotations in the low-temperature phase. Such couplings are readily allowed by the crystalline symmetry of perovskite ferroelectrics and antiferroelectrics, and are likely therefore to control or at least have a dominant role in similar phenomena (for example, antiferroelectricity in BiFeO 3 derivatives (Borisevich et al 31 and Goian et al 35 ).…”

Section: Discussionmentioning

confidence: 99%

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The origin of antiferroelectricity in PbZrO3

et al. 2013

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Antiferroelectrics are essential ingredients for the widely applied piezoelectric and ferroelectric materials: the most common ferroelectric, lead zirconate titanate is an alloy of the ferroelectric lead titanate and the antiferroelectric lead zirconate. Antiferroelectrics themselves are useful in large digital displacement transducers and energy-storage capacitors. Despite their technological importance, the reason why materials become antiferroelectric has remained allusive since their first discovery. Here we report the results of a study on the lattice dynamics of the antiferroelectric lead zirconate using inelastic and diffuse X-ray scattering techniques and the Brillouin light scattering. The analysis of the results reveals that the antiferroelectric state is a 'missed' incommensurate phase, and that the paraelectric to antiferroelectric phase transition is driven by the softening of a single lattice mode via flexoelectric coupling. These findings resolve the mystery of the origin of antiferroelectricity in lead zirconate and suggest an approach to the treatment of complex phase transitions in ferroics.

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Section: Resultssupporting

confidence: 75%

Section: Discussionmentioning

confidence: 99%

The origin of antiferroelectricity in PbZrO3

et al. 2013

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“…Hence, if f is large enough, the domain wall energy can become negative, making the material unstable with respect to the development of modulated phases. Borisevich et al argued that this is precisely what happens at the ferroelectric-antiferroelectrics phase boundary in Sm-substituted BiFeO 3 thin films [98]. In terms of lattice dynamics theory, the instability arises from the interaction (or "mode coupling") between the optical and acoustic phonons, as originally discussed by Axe et al [26].…”

Section: ∂P ∂Xmentioning

confidence: 87%

Flexoelectric Effect in Solids

Zubko

Catalán

Tagantsev

2013

Annu. Rev. Mater. Res.

884

663

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Piezoelectricity-the coupling between strain and electrical polarization, allowed 2 Zubko, Catalan, Tagantsev by symmetry in a restricted class of materials-is at the heart of many devices that permeate our daily life. Since its discovery in the 1880's by Pierre and Jacques Curie, the piezoelectric effect has found use in everything from submarine sonars to cigarette lighters. By contrast, flexoelectricity-the coupling between polarization and strain gradients, allowed by symmetry in all materials-was largely overlooked for decades since its first proposal in the late 1950's, due to the seemingly small magnitude of the effect in bulk. The development of nanoscale technologies, however, has renewed the interest in flexoelectricity, as the large strain gradients often present at the nanoscale can lead to dramatic flexoelectric phenomena. Here we review the fundamentals of the flexoelectric effect, discuss its presence in many nanoscale systems, and look at potential applications of this fascinating phenomenon. The review will also emphasize the many open questions and unresolved issues in this developing field.

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“…Let us mention some of them. The Landau-theory modeling of ferroic domain walls by Morozovska and coworkers [61,62] and Yudin et al [63] demonstrated an essential impact of flexoelectricity on the properties of the domain walls (structure, energy, and electrical conductivity). Majdoub et al [64] and Zhuo et al [65] modeled the 'dead layer' effect on ferroelectric thin films conditioned by flexoelectricity.…”

Section: Historical Overview and Outlook Of The Fieldmentioning

confidence: 99%

“…To simplify this the relations (62) and (63) were used. Once the parameters c 44 , α = 1/ε f entering relationship (144) are known, the absolute value of f tot 44 can be determined by fitting the experimental spectrum to relationship (144).…”

Section: Crystals-phonon Datamentioning

confidence: 99%

Fundamentals of flexoelectricity in solids

2013

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The flexoelectric effect is the response of electric polarization to a mechanical strain gradient. It can be viewed as a higher-order effect with respect to piezoelectricity, which is the response of polarization to strain itself. However, at the nanoscale, where large strain gradients are expected, the flexoelectric effect becomes appreciable. Besides, in contrast to the piezoelectric effect, flexoelectricity is allowed by symmetry in any material. Due to these qualities flexoelectricity has attracted growing interest during the past decade. Presently, its role in the physics of dielectrics and semiconductors is widely recognized and the effect is viewed as promising for practical applications. On the other hand, the available theoretical and experimental results are rather contradictory, attesting to a limited understanding in the field. This review paper presents a critical analysis of the current knowledge on the flexoelectricity in common solids, excluding organic materials and liquid crystals.

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Atomic-scale evolution of modulated phases at the ferroelectric–antiferroelectric morphotropic phase boundary controlled by flexoelectric interaction

Cited by 152 publications

References 62 publications

The origin of antiferroelectricity in PbZrO3

The origin of antiferroelectricity in PbZrO3

Flexoelectric Effect in Solids

Fundamentals of flexoelectricity in solids

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