Effect of Sm, Co codoping on the dielectric and magnetoelectric properties of BiFeO3 polycrystalline ceramics

Song, Guilin; Zhang, H.X.; Wang, T.X.; Yang, Haigang; Chang, Fanggao

doi:10.1016/j.jmmm.2012.02.024

Cited by 64 publications

(5 citation statements)

References 29 publications

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“…can observe that all the samples appear to have a grain melting phenomenon and have a hazy grain boundary, which is similar to the reported results for Sm-modified BFO. 40 As a result, the ceramics with x = 0.025 and y = 0.05 have a much denser microstructure owing to the suppression of the loss of Bi.…”

Section: Resultsmentioning

confidence: 99%

Enhanced piezoelectric activity in high-temperature Bi_1−x−ySm_xLa_yFeO₃ lead-free ceramics

Zheng

2015

J. Mater. Chem. C

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We have developed a high-temperature bismuth ferrite ceramics with enhanced piezoelectric activity by chemical modifications, that is, the Bi 1ÀxÀy Sm x La y FeO 3 (0 r x r 0.30 and 0 r y r 0.15) lead-free ceramics were prepared by a conventional solid-state method. The influences of La and Sm content on their microstructure and electrical properties were systematically investigated. The ceramics with 0 r x o 0.10 (y = 0.05) or 0 r y r 0.15 (x = 0.025) belong to a triclinic phase, and a mixed structure with rhombohedral-like and orthorhombic phases was found in the ones with 0.10 r x r 0.30 (y = 0.05).The electrical properties of the ceramics can be operated by refining the x and y values. A very low dielectric loss (tan d B 0.43%) was shown in the ceramics with x = 0.025 and y = 0.05 because of the involvement of low defect concentrations. In addition, the ceramics with x = 0.025 and y = 0.05 also possess a high piezoelectric activity (d 33 B 50 pC N À1 ), which is larger with the respect to the previously reported results in high-temperature piezoceramics with a Curie temperature of 4600 1C, and a better thermal stability of piezoelectricity in 20-700 1C is also shown. We believe that this material system is suitable for high-temperature piezoelectric applications.

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Section: Resultsmentioning

confidence: 99%

Enhanced piezoelectric activity in high-temperature Bi_1−x−ySm_xLa_yFeO₃ lead-free ceramics

Zheng

2015

J. Mater. Chem. C

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“…It is worth noting that there is a large spread of reported values in the literature for the dielectric constant of BiFeO 3 . For instance, values between 15 and 150 have been reported, ,− suggesting that ε of BiFeO 3 is highly sensitive to morphological parameters determined by synthesis, postsynthesis treatments, etc.…”

Section: Resultsmentioning

confidence: 99%

SBR/BiFeO₃ Elastomer Capacitor Films Prepared under Magnetic and Electric Fields Displaying Magnetoelectric Coupling

Medina¹,

Jorge

Rubi

et al. 2015

J. Phys. Chem. C

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The dielectric properties of elastomer composites formed by dispersions of bismuth ferrite (BiFeO 3) multiferroic filler particles in styrene− butadiene rubber (SBR) were studied. The SBR/BiFeO 3 films (10−100 μm) were prepared in the presence of electric (E) or magnetic fields (H), showing remarkable characteristics in comparison with systems obtained in its absence. The dispersed multiferroic fillers form clusters of much smaller size when prepared under E or H. The dielectric constant, ε (measured up to 1 MHz), increases with BiFeO 3 concentration until reaching saturation. The rise of ε was obtained at concentrations much lower for samples prepared in the presence of E or H than in its absence. Saturation is assigned to connectivity between filler clusters at the largest concentrations, increasing leakage currents and limiting the dielectric behavior. The whole dependence of ε with BiFeO 3 concentration was described using a proposed model. The dc resistivities, ρ, increase with BiFeO 3 concentration but remain high (ρ ≈ 10 GΩ•cm), allowing using the films as capacitors with filter action between 100 kHz and 7 MHz. The films prepared in the presence of H present strong dependence of the ferroelectric response with magnetic fields applied af ter preparation; that is, electromagnetic coupling was observed in those samples. 49 (SBR) embedded with Fe 3 O 4 −Ag superparamagnetic particles 50 by evaporating the solvent between two magnets. The particles 51 group forming needle-like structures aligned in the direction of 52 the magnetic field applied during preparation, providing the 53 anisotropic properties. The concentration threshold for 54 obtaining the desired effect is significantly reduced in 55 comparison with random composites. 9 56 Other devices of high relevance are elastomer/multiferroic 57 capacitors, where a multiferroic filler, which presents 58 simultaneously magnetic and electric orders at room temper-59 ature, 10,11 is dispersed in the elastomer polymer. The 60 exploration of these systems has already been started recently 61 using BiFeO 3 nanoparticles, which are the paradigmatic single-62 phase multiferroic compounds. 12−16 For instance, Bhadra et 63 al. 13 used the ferroelectric elastomer poly(vinylidene fluoride) 64 (PVDF), whose dielectric response was enhanced by randomly 65 dispersing BiFeO 3. Tamboli et al. and Ahlawat et al. reported

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“…1a, b). The decrease of the grain sizes can be attributed to the suppression of oxygen vacancies due to charge compensation mechanism, which can slow the oxygen ion motion and consequently reduce the grain growth rate [22,23]. It is reported that the surface morphologies of thin films have an effect on their physical properties, for example, denser structure can reduce leakage current and smaller grain size can enhance magnetic property and so on [24].…”

Section: Resultsmentioning

confidence: 99%

Studies on structural, electrical and magnetic properties of Dy-doped BiFeO3 thin films

Yan

Tan

Liu

et al. 2015

J Mater Sci: Mater Electron

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Effect of Sm, Co codoping on the dielectric and magnetoelectric properties of BiFeO3 polycrystalline ceramics

Cited by 64 publications

References 29 publications

Enhanced piezoelectric activity in high-temperature Bi_1−x−ySm_xLa_yFeO₃ lead-free ceramics

Enhanced piezoelectric activity in high-temperature Bi_1−x−ySm_xLa_yFeO₃ lead-free ceramics

SBR/BiFeO₃ Elastomer Capacitor Films Prepared under Magnetic and Electric Fields Displaying Magnetoelectric Coupling

Studies on structural, electrical and magnetic properties of Dy-doped BiFeO3 thin films

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Effect of Sm, Co codoping on the dielectric and magnetoelectric properties of BiFeO3 polycrystalline ceramics

Cited by 64 publications

References 29 publications

Enhanced piezoelectric activity in high-temperature Bi1−x−ySmxLayFeO3 lead-free ceramics

Enhanced piezoelectric activity in high-temperature Bi1−x−ySmxLayFeO3 lead-free ceramics

SBR/BiFeO3 Elastomer Capacitor Films Prepared under Magnetic and Electric Fields Displaying Magnetoelectric Coupling

Studies on structural, electrical and magnetic properties of Dy-doped BiFeO3 thin films

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Enhanced piezoelectric activity in high-temperature Bi_1−x−ySm_xLa_yFeO₃ lead-free ceramics

Enhanced piezoelectric activity in high-temperature Bi_1−x−ySm_xLa_yFeO₃ lead-free ceramics

SBR/BiFeO₃ Elastomer Capacitor Films Prepared under Magnetic and Electric Fields Displaying Magnetoelectric Coupling