Sol-gel derived multiferroic BiFeO3 ceramics with large polarization and weak ferromagnetism

Chen, F.; Zhang, Q. F.; Li, Jinhua; Qi, Yajun; Lu, Can‐Zhong; Chen, X. B.; Ren, Xu; Zhao, Yunshi

doi:10.1063/1.2345603

Cited by 86 publications

(51 citation statements)

References 17 publications

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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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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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“…12 To overcome these leakage problems ion substitution 13,14 or solid solution with other perovskite materials 15,16 has been tried, and wellsaturated hysteresis loop with remanent polarization has recently been reported in single phase BiFeO 3 ceramics. 17,18 Stoichiometric BFO has a G type AF structure 19 and has residual magnetic moment due to the canting of magnetic moments arising from oxygen vacancies. 20 In the present work we report the synthesis and study of electric and magnetic properties of the ͑Bi 0.9 Pb 0.1 ͒ ϫ͑Fe 0.9 Ti 0.1 ͒O 3 ͑BPFTO͒ nanocrystalline multiferroic system.…”

mentioning

confidence: 99%

Study of electric and magnetic properties of (Bi0.9Pb0.1) (Fe0.9Ti0.1)O3 nanomultiferroic system

Singh

Kotnala

Singh

2008

Applied Physics Letters

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Multiferroic compound ͑Bi 0.9 Pb 0.1 ͒͑Fe 0.9 Ti 0.1 ͒O 3 ͑BPFTO͒, having particle size of 15-25 nm, was synthesized by solution combustion method. BPFTO shows the coexistence of ferroelectricity and magnetism at room temperature. Significant enhancement in magnetic moment with moderate value of the electrical polarization is observed for nano-BPFTO. Remanent polarization and maximum polarizations were 1.056 and 1.866 C / cm 2 , respectively ͑at 20 kV/cm͒, with remanent magnetization of 285 memu/g. Such materials, possessing good value of dielectric constant and showing ferroelectric and ferromagnetism in same phase, are of great importance from technical point of view. © 2008 American Institute of Physics. ͓DOI: 10.1063/1.3030989͔In recent years, there has been an increasing interest in multiferroic materials, which have simultaneously two or more order parameters such as ferromagnetic, ferroelectric, and/or ferroelastic ordering. 1,2 Coupling between magnetic and electric ordering leads to electromagnetic ͑EM͒ effect. The EM effect provides an additional degree of freedom in designing of functional sensor, current devices, transducers, and multistate memory devices. 3,4 However there is a scarcity of materials exhibiting magnetoelectric behavior at room temperature, which is possibly due to the fact that the transition metal d electron, essential in the presence of magnetic moment, also reduces lattice distortion. Lattice distortion is essential in the presence of the ferroelectric behavior. The perovskite BiFeO 3 ͑BFO͒ is one of the few known magnetoelectric multiferroics in which ferroelectric ͑T c ϳ 830°C͒ and antiferromagnetic ͑AF͒ ͑T N ϳ 370°C͒ order parameters coexist up to quite high temperature. 5,6 In BFO, Bi-O orbital hybridization due to Bi 6s 2 lone pair is responsible for ferroelectric instability while Fe-O-Fe Dzyaloshinski Moriyaantisymmetric interaction ͑DMI͒ gives rise to complicated magnetic structure. 7 The structural properties of bulk BFO single crystal have been extensively studied and have been shown to possess rhombohedral distorted perovskite structure and space group R3C at room temperature. 8 The spontaneous polarization of bulk BFO was expected to be 90-110 C / cm 2 ͑Ref. 9͒ because of large atomic displacement and a high Curie temperature. However, a small polarization has been observed in bulk BFO single crystal 10 and BFO bulk ceramics, 11 and their hysteresis loops were not saturated, which were attributed to the high level of leakage due to charge defects and nonstoichiometry. 12 To overcome these leakage problems ion substitution 13,14 or solid solution with other perovskite materials 15,16 has been tried, and wellsaturated hysteresis loop with remanent polarization has recently been reported in single phase BiFeO 3 ceramics. 17,18 Stoichiometric BFO has a G type AF structure 19 and has residual magnetic moment due to the canting of magnetic moments arising from oxygen vacancies. 20 In the present work we report the synthesis and study of electric and magnetic properties of th...

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“…As mentioned, rapid liquid phase sintering is a method frequently used to obtain BiFeO 3 materials [48][49][50]106]. In the Bi 2 O 3 -Fe 2 O 3 system, annealing at temperatures above ~ 775 ºC may result in the formation of a Bi-rich liquid phase [35].…”

Section: Synthesis Microstructure and Properties Of Bifeo 3 -Based Mmentioning

confidence: 99%

Synthesis, microstructure and properties of BiFeO<sub>3</sub>-based multiferroic materials: A review

Bernardo¹

2014

Bol. Soc. Esp. Ceram. Vidr.

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Sol-gel derived multiferroic BiFeO3 ceramics with large polarization and weak ferromagnetism

Cited by 86 publications

References 17 publications

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

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

Study of electric and magnetic properties of (Bi0.9Pb0.1) (Fe0.9Ti0.1)O3 nanomultiferroic system

Synthesis, microstructure and properties of BiFeO<sub>3</sub>-based multiferroic materials: A review

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