Enhanced direct flexoelectricity in paraelectric phase of Ba(Ti0.87Sn0.13)O3 ceramics

Shu, Longlong; Wei, Xiaoyong; Jin, Li; Li, Yong; Wang, Hong; Yao, Xi

doi:10.1063/1.4802450

Cited by 73 publications

(31 citation statements)

References 30 publications

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“…These acceptors or donors may also be activated with less energy. 27 The electrical properties of BTBFT ceramics were studied by the CIS method. It is essential to alter the dielectric and electrical data in different kinds of formalism and evaluate them to get a true picture of the material.…”

Section: Introductionmentioning

confidence: 99%

Dielectric, electrical conduction and magnetic properties of multiferroic Bi0.8Tb0.1Ba0.1Fe0.9Ti0.1O₃ perovskite compound

2017

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This work focuses on the structural, electrical and magnetic properties of Bi 0:8 Tb 0:1 Ba 0:1 Fe 0:9 Ti 0:1 O 3 ceramics, fabricated by solid state reaction procedure. XRD forms of the samples at RT exhibited perovskite phase through the hexagonal structure at room temperature. Dielectric studies of the materials with frequency at different temperatures (25-400 C) exhibit two dielectric anomalies, first at 175 C (ferroelectric-ferroelectric transition) and second at around 320 C (ferroelectric-paraelectric transition). The Curie temperature moved towards the low side temperature with the increase in frequency. The less value of activation energy got for these samples could be attributed to the influence of electronic contribution to the conductivity. A significant change in the magnetic studies was observed for Bi 0:8 Tb 0:1 Ba 0:1 Fe 0:9 Ti 0:1 O 3 ceramic. The impedance analysis confirms the non-Debye type nature of the ceramic and relaxation frequency moved to a higher temperature. The Nyquist plot and conductivity studies showed the NTCR behavior of samples. The highest magnetization field was found at temperature À268.15 C.

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Section: Introductionmentioning

confidence: 99%

Dielectric, electrical conduction and magnetic properties of multiferroic Bi0.8Tb0.1Ba0.1Fe0.9Ti0.1O₃ perovskite compound

2017

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“…The transverse flexoelectric coefficient was calculated to be as high as 100 µC/m at 12 Hz, which is comparable with that of some perovskite ceramics. 5, [12][13][14]29 The error bar of each measurement data in Fig. 2 originates from the small deviation of the collected charge under strain gradient.…”

Section: Resultsmentioning

confidence: 99%

“…13 In order to verify the accuracy of the PMN-PT flexoelectric measurement, reference sample Al 2 O 3 ceramic was employed into the cantilever system. 5, 12,13 No electric charge was captured in Al 2 O 3 ceramic even when the applied strain gradient was set up to 10 -2 m -1 , suggesting our measurement is reliable. Consequently, the measured electric charge of PMN-PT single crystal was only accounted for material itself instead of the measurement system.…”

Section: Resultsmentioning

confidence: 99%

“…Thanks to the pioneering work by Ma and Cross, significantly enhanced flexoelectricity was found in some of the ABX 3 type perovskites represented by barium strontium titanate ceramic, and hence triggered the investigation of flexoelectricity in solids to an unprecedentedly new height. [12][13][14] Subsequently, theoretical work as well as the first principle calculation of flexoelectricity was gradually developed. [15][16][17] However, till now, the enhancement mechanism of flexoelectricity is still unclear.…”

Section: Introductionmentioning

confidence: 99%

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Frequency dispersion of flexoelectricity in PMN-PT single crystal

et al. 2017

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The mechanism of the recent discovered enhanced flexoelectricity in perovskites has brought about numerous controversies which still remain unclear. In this paper, we employed relaxor 0.68Pb(Mg2/3Nb1/3)O3 -0.32PbTiO3 (PMN-PT) single crystals for study. The observed flexoelectric coefficient in PMN-PT single crystal reaches up to 100 μC/m, and in a relative low frequency range, exhibits an abnormal frequency dispersion phenomenon with a positive relationship with frequency. Such frequency dispersion regulation is different from the normal relaxation behavior that usually occur a time delay, and hence proves the flexoelectricity acting more like bulk effect rather than surface effect in this kind of materials.

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“…It also underlines the consequent enhancement of the flexoelectric response near the transition in a relaxor, as well as in a ferroelectric, as was previously reported. 14,15,41,42 The relaxor terpolymer, in principle, has two temperature-dependent phases: a low temperature phase comprising of nanopolar regions (Phase I) and high temperature paraelectric phase (Phase II). The flexoelectric coupling coefficient F for Phase II is twice the value for Phase I.…”

Section: Discussionmentioning

confidence: 99%

Temperature dependence of flexoelectric response in ferroelectric and relaxor polymer thin films

Poddar

Ducharme

2014

Journal of Applied Physics

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We report the temperature dependence of the flexoelectric response in thin films of both ferroelectric and relaxor forms of vinylidene fluoride polymers. The ferroelectric samples were depoled to minimize piezoelectric response by heating them beyond their Curie temperature and then cooling in zero applied electric field. In both the relaxor ferroelectric polymer and the paraelectric state of the ferroelectric copolymer, the flexoelectric coefficient was proportional to the dielectric constant over a limited range of temperatures, in agreement with general theoretical principles. The enhancements in flexoelectric response were also observed near the Curie transition temperature for the ferroelectric polymer and near the dielectric relaxation temperature for the relaxors. The broad dielectric anomaly in these systems provides greater temperature stability for these enhancements.

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Enhanced direct flexoelectricity in paraelectric phase of Ba(Ti0.87Sn0.13)O3 ceramics

Cited by 73 publications

References 30 publications

Dielectric, electrical conduction and magnetic properties of multiferroic Bi0.8Tb0.1Ba0.1Fe0.9Ti0.1O₃ perovskite compound

Dielectric, electrical conduction and magnetic properties of multiferroic Bi0.8Tb0.1Ba0.1Fe0.9Ti0.1O₃ perovskite compound

Frequency dispersion of flexoelectricity in PMN-PT single crystal

Temperature dependence of flexoelectric response in ferroelectric and relaxor polymer thin films

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Enhanced direct flexoelectricity in paraelectric phase of Ba(Ti0.87Sn0.13)O3 ceramics

Cited by 73 publications

References 30 publications

Dielectric, electrical conduction and magnetic properties of multiferroic Bi0.8Tb0.1Ba0.1Fe0.9Ti0.1O3 perovskite compound

Dielectric, electrical conduction and magnetic properties of multiferroic Bi0.8Tb0.1Ba0.1Fe0.9Ti0.1O3 perovskite compound

Frequency dispersion of flexoelectricity in PMN-PT single crystal

Temperature dependence of flexoelectric response in ferroelectric and relaxor polymer thin films

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Product

Resources

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Dielectric, electrical conduction and magnetic properties of multiferroic Bi0.8Tb0.1Ba0.1Fe0.9Ti0.1O₃ perovskite compound

Dielectric, electrical conduction and magnetic properties of multiferroic Bi0.8Tb0.1Ba0.1Fe0.9Ti0.1O₃ perovskite compound