Study of the Inverse Flexoelectric Phenomena in Ceramic Lead Magnesium Niobate-Lead Titanate

Hana, P.; Marvan, M.; Burianova, L.; Zhang, Shujun; Furman, Eugene; Shrout, T. R.

doi:10.1080/00150190600696006

Cited by 20 publications

(15 citation statements)

References 5 publications

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“…This method was used by Fu and coworkers to measure the converse flexoelectric effect and thus estimate the flexoelectric coefficientμ 11 for BST, which was found to be in excellent agreement with measurements of the direct flexoelectric effect [31]. A similar method was also used by Hana et al to study converse flexoelectricity in PbMg 1/3 Nb 2/3 O 3 -PbTiO 3 [33,107].…”

Section: Ceramics-macroscopic Measurementsmentioning

confidence: 84%

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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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Section: Ceramics-macroscopic Measurementsmentioning

confidence: 84%

“…where R is the radius of the plate and G is given by (107), one readily finds that the both modes are controlled by the same effective piezoelectric coefficient…”

Section: Blocking Boundary Conditionsmentioning

confidence: 99%

Fundamentals of flexoelectricity in solids

2013

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“…At first pass, one might assume that flexoelectricity could be easily studied by applying an external inhomogeneous strain to a material, and initially, researchers took this approach [397,[416][417][418][419][420][421][422][423][424]. While it was possible for researchers to measure changes in polarization and extract a value of the flexoelectric coefficient, these experiments were imprecise, with even the best experimental designs having limited control and ability to measure the strain and electric field gradients necessary to accurately measure flexoelectricity [420,422].…”

Section: Strain Gradients and Flexoelectricitymentioning

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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“…Such large flexoelectric coefficients are particularly puzzling as theoretical considerations suggest that flexocoupling coefficients in excess of 10-15 V should make the perovskite structure unstable to formation of incommensurate phases; this will be discussed in more detail in section 5.2.5. For PMN-PT, the measured coefficients were found to vary by orders of magnitude depending on the measurement method used [57,58].…”

Section: Quantifying Flexoelectricity In Bulkmentioning

confidence: 99%

Flexoelectric Effect in Solids

Zubko

Catalán

Tagantsev

2013

Annu. Rev. Mater. Res.

921

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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Study of the Inverse Flexoelectric Phenomena in Ceramic Lead Magnesium Niobate-Lead Titanate

Cited by 20 publications

References 5 publications

Fundamentals of flexoelectricity in solids

Fundamentals of flexoelectricity in solids

New modalities of strain-control of ferroelectric thin films

Flexoelectric Effect in Solids

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