Pyroelectric properties of BiFeO3 ceramics prepared by a modified solid-state-reaction method

Yao, Yingbang; Ploss, B.; Mak, Chee Leung; Wong, K. H.

doi:10.1007/s00339-009-5499-1

Cited by 37 publications

(22 citation statements)

References 17 publications

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“…At room temperature d 33 is small ($ 18 pm/V), in concordance with experimental values. We note that there is a very broad range of reported values in ceramics, from 4 pm/V to 60 pm/V [34][35][36][37]. The problem is the high electrical conductivity of the samples which prevents the application of a high electric field for an efficient poling.…”

Section: Resultsmentioning

confidence: 94%

Dielectric and piezoelectric properties of BiFeO3 from molecular dynamics simulations

Graf

Sepliarsky

Machado

et al. 2015

Solid State Communications

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Section: Resultsmentioning

confidence: 94%

Dielectric and piezoelectric properties of BiFeO3 from molecular dynamics simulations

Graf

Sepliarsky

Machado

et al. 2015

Solid State Communications

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“…No dielectric anomaly was observed around 80 • C. Fig. 4 presents the Raman spectra of Sm-doped BFO ceramics from room temperature up to 150 • C. The Raman active modes of the rhombohedral BFO with R3c structure are summarized using the irreducible representation Raman,R3c = 4A 1 + 9E [17][18][19][20]. For example, in sample Sm1, three A 1 (A 1 (LO1) = 130 cm −1 , A 1 (LO2) = 167 cm −1 , and A 1 (LO3) = 218 cm −1 ) and five E (E(TO1) = 79 cm −1 , E(TO2) = 101 cm −1 , E(TO7) = 482 cm −1 , E(TO8) = 527 cm −1 , E(TO9) = 600 cm −1 ) phonon modes were identified.…”

Section: Resultsmentioning

confidence: 99%

“…At high electrical field and high temperature the BFO ceramics are apt to break down [19], therefore, the poling field and the poling temperature of all the samples were set at 70 kV/cm and room temperature, respectively. This poling field value was slightly larger than the E c ∼ 56 kV/cm obtained in our samples.…”

Section: Resultsmentioning

confidence: 99%

Pyroelectric properties and electrical conductivity in samarium doped BiFeO3 ceramics

Yao

Mak

2012

Journal of Alloys and Compounds

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“…10 In spite of the extensive research on BiFeO 3 and its chemical modifications, the knowledge of the piezoelectric response of pure BiFeO 3 ceramics is rather poor and usually only values of d 33 are reported, which range from 4 to 60 pm/V. [11][12][13][14] The reason for the large spread in the values is probably a combination of high electrical conductivity and high coercive field (50-85 kV/cm), which are strongly processing sensitive, 11,[15][16][17][18] and difficulties in processing the ferrite. [19][20][21] The problem of the high electrical conductivity, which prevents application of high electric fields to BiFeO 3 , is often overcome by measuring the electromechanical response only locally using piezoforce microscopy (PFM).…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric nonlinearity and frequency dispersion of the direct piezoelectric response of BiFeO3 ceramics

Rojac¹,

Benčan²,

Dražić³

et al. 2012

Journal of Applied Physics

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We report on the frequency and stress dependence of the direct piezoelectric d 33 coefficient in BiFeO 3 ceramics. The measurements reveal considerable piezoelectric nonlinearity, i.e., dependence of d 33 on the amplitude of the dynamic stress. The nonlinear response suggests a large irreversible contribution of non-180° domain walls to the piezoelectric response of the ferrite, which, at present measurement conditions, reached a maximum of 38% of the total measured d 33 . In agreement with this interpretation, both types of non-180° domain walls, characteristic for the rhombohedral BiFeO 3 , i.e., 71° and 109°, were identified in the poled ceramics using transmission electron microscopy (TEM). In support to the link between nonlinearity and non-180° domain wall contribution, we found a correlation between nonlinearity and processes leading to deppining of domain walls from defects, such as quenching from above the Curie temperature and high-temperature sintering. In addition, the nonlinear piezoelectric response of BiFeO 3 showed a frequency dependence that is 2 qualitatively different from that measured in other nonlinear ferroelectric ceramics, such as "soft" (donor-doped) Pb(Zr,Ti)O 3 (PZT), i.e., in the case of the BiFeO 3 large nonlinearities were observed only at low field frequencies (<0.1 Hz); possible origins of this dispersion are discussed. Finally, we show that, once released from pinning centers, the domain walls can contribute extensively to the electromechanical response of BiFeO 3 ; in fact, the extrinsic domain-wall contribution is relatively as large as in Pb-based ferroelectric ceramics with morphotropic phase boundary (MPB) composition, such as PZT. This finding might be important in the search of new lead-free MPB compositions based on BiFeO 3 as it suggests that such compositions might also exhibit large extrinsic domain-wall contribution to the piezoelectric response. a) Electronic mail: tadej.rojac@ijs.si 3

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Pyroelectric properties of BiFeO3 ceramics prepared by a modified solid-state-reaction method

Cited by 37 publications

References 17 publications

Dielectric and piezoelectric properties of BiFeO3 from molecular dynamics simulations

Dielectric and piezoelectric properties of BiFeO3 from molecular dynamics simulations

Pyroelectric properties and electrical conductivity in samarium doped BiFeO3 ceramics

Piezoelectric nonlinearity and frequency dispersion of the direct piezoelectric response of BiFeO3 ceramics

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