Effects of poling on the electrical and electromechanical response of PMN–PT relaxor ferroelectric ceramics

Otoničar, Mojca; Bradeško, Andraž; Salmanov, Samir; Chung, Ching‐Chang; Jones, Jacob L.; Rojac, Tadej

doi:10.1016/j.oceram.2021.100140

Cited by 11 publications

(3 citation statements)

References 84 publications

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“…The large hysteresis in the nonlinear piezoelectric response of PMN‐rich compositions with relaxor behavior is thus interpreted in terms of a mechanism involving extensive and correlated hysteretic switching events inside a matrix with high‐density DWs. This mechanism is consistent with the local cascade‐like switching of low‐angle DWs as recently proposed using in situ XRD analysis on PMN–30PT 172 . In contrast to previous studies discussing the dynamics of highly dense hierarchical DWs in the frame of polarization rotation and MPB effects, 54,173,174 we report here on an extended effect of hysteretic displacements of the low‐angle DWs further away from the T‐phase region and the associated MPB (see the green arrow in Figure 6A).…”

Section: Dynamic Contribution Of Domain Walls To Propertiessupporting

confidence: 90%

“…This mechanism is consistent with the local cascade-like switching of low-angle DWs as recently proposed using in situ XRD analysis on PMN-30PT. 172 In contrast to previous studies discussing the dynamics of highly dense hierarchical DWs in the frame of polarization rotation and MPB effects, 54,173,174 we report here on an extended effect of hysteretic displacements of the low-angle DWs further away from the T-phase region and the associated MPB (see the green arrow in Figure 6A). The effect, which is absent in PZT, is evident by the large 𝛼 * and tan𝛿 𝑝 , characteristic for off-MPB PMN-PT compositions (see arrows in Figure 5C,E and compare with Figure 5D,F).…”

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confidence: 96%

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Dynamics of domain walls in ferroelectrics and relaxors

2022

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The dynamic contribution of domain walls (DWs) to application-relevant dielectric and piezoelectric properties of ferroelectrics and relaxor-based oxide ceramics has been in the focus since the earliest studies on these complex multifunctional materials. Despite the vital importance of DWs in the material design for targeted applications, the understanding of these interfaces has been significantly advanced only recently owing to the concurrent development of analytical methodologies probing the structure of samples in situ and at different length scales. In this contribution, we present two recent cases that have raised particular attention and controversy. The first is on the electrically conductive DWs in BiFeO 3 (BFO), whereas the second is on low-angle DWs characteristic for relaxor ferroelectric Pb(Mg 1/3 Nb 2/3 )O 3 −xPbTiO 3 (PMN-PT). Using nonlinear piezoelectric measurements with the support from multiscale structural analysis, we illustrate with the two case studies how, on one hand, the local electrical conductivity in BFO and, on the other hand, the structural disorder inherent to PMN-PT affect DW dynamics, leading to emerging macroscopic effects. By clarifying some of the aspects of these particular interfaces, we hope that the presented results will provide guidance to analytical approaches for identifying the key microscopic mechanisms contributing to macroscopic functional properties of ferroelectric and related materials.

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Section: Dynamic Contribution Of Domain Walls To Propertiessupporting

confidence: 90%

contrasting

confidence: 96%

Dynamics of domain walls in ferroelectrics and relaxors

2022

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“…In agreement with these structural studies, it was recently found that the field-induced response of low-angle DWs dominates the piezoelectric nonlinearity of undoped monoclinic PMN-xPT compositions (20 < x < 32) with relaxor features (30). In particular, the large hysteretic IR response (as also identified here for the undoped PMN-29PT) was proposed to originate from a cascade-like DW switching (53). On the other hand, the origin of the anhysteretic R DW motion (green area in Fig.…”

supporting

confidence: 84%

Origins of the large piezoelectric response of samarium-doped lead magnesium niobate–lead titanate ceramics

Arzenšek,

Toš,

Drnovšek

et al. 2024

Sci. Adv.

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The recent discovery of the large piezoelectric response of Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 (PMN-PT) ceramics induced by samarium doping has provided a substantially improved functionality to the group of lead-based relaxor-ferroelectric materials. Different mechanisms have been so far proposed for the large piezoelectricity; however, the explanations are contradictory and focused on a unified description. Here, we use nonlinear harmonic piezoelectric measurements combined with multiscale structural analysis to clarify the origins of the ultrahigh piezoelectric response of samarium-doped PMN-PT. Our methodological approach allowed us to separate the multiple piezoelectric contributions, revealing their quantitative role in the total response. The results show that the ultrahigh piezoelectricity cannot be attributed to a single mechanism but is rather a complex combination of different contributions originating from the multiple effects of samarium doping on the long- and short-range structure of PMN-PT. The study offers a baseline for future engineering of the key material parameters affecting the large piezoelectric response of relaxor-ferroelectric ceramics.

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The output performance evaluations of multilayered piezoelectric nanogenerators based on the PVDF-HFP/PMN-35PT using various layer-by-layer assembly techniques

Paralı

2024

J Mater Sci: Mater Electron

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Multilayered Poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and lead magnesium niobate lead titanate Pb (Mg1/3Nb2/3) O3–PbTiO3 (PMN-35PT) composition-based piezoelectric nanogenerators (PNGs) were fabricated as series, parallel, and combined series-parallel connections using various layer-by-layer assembly techniques. Supporting the theoretical approaches with experimental results shows that the fabricated four-layered PNG with parallel connections (4L-P) reached an open-circuit voltage of 0.4 V (VRMS) and a maximum electrical power of 0.3 µW (PRMS) by drawing a current (IRMS) of 1.46 µA under a resistive load of 140.2 KΩ. Increasing the capacitance and decreasing the impedance with the fabrication of the four-layer PNG by connecting the layers in parallel connection with the support of the impedance matching process led to an increase in electrical output. With the use of an impedance matching system, the piezoelectric performance tests revealed that the 4L-P-based PNG had a 6.7 times greater electrical power efficiency (72.92 µW) at the vibrational frequency of 20 Hz compared to that of the single-layered PNG (10.82 µW). Furthermore, the multilayer PNG was successfully used as a wearable sensor for the monitoring of human body motions in real time on an IOT (Internet of Things) platform.

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Effects of poling on the electrical and electromechanical response of PMN–PT relaxor ferroelectric ceramics

Cited by 11 publications

References 84 publications

Dynamics of domain walls in ferroelectrics and relaxors

Dynamics of domain walls in ferroelectrics and relaxors

Origins of the large piezoelectric response of samarium-doped lead magnesium niobate–lead titanate ceramics

The output performance evaluations of multilayered piezoelectric nanogenerators based on the PVDF-HFP/PMN-35PT using various layer-by-layer assembly techniques

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