Dielectric and piezoelectric properties of lead-free (Bi,Na)TiO3-based thin films

Abazari, M.; Safari, A.; Bharadwaja, S. S. N.; Trolier-McKinstry, Susan

doi:10.1063/1.3309706

Cited by 107 publications

(51 citation statements)

References 22 publications

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“…[8][9][10][11][12] Consequently, doping effects on the electrical properties of thin film BNBT materials are still unclear. Abazari et al 13 has recently reported epitaxial potassium modified BNBT thin films grown on SrRuO 3 coated SrTiO 3 substrates by pulsed laser deposition ͑PLD͒. Dielectric and piezoelectric properties of the films were evaluated macroscopically.…”

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confidence: 99%

Enhanced ferroelectric and piezoelectric properties in doped lead-free (Bi0.5Na0.5)0.94Ba0.06TiO3 thin films

Wang

Chan

et al. 2010

Applied Physics Letters

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Doping effects with respect to the electrical properties of morphotropic phase boundary ͑Bi 0.5 Na 0.5 ͒ 0.94 Ba 0.06 TiO 3 thin films epitaxially grown on CaRuO 3 electroded ͑LaAlO 3 ͒ 0.3 ͑Sr 2 AlTaO 6 ͒ 0.35 ͑001͒ substrates were investigated. Substantial enhancement of ferroelectricity and piezoelectricity has been achieved in La+ Ce codoped films with a remanent polarization P r of 29.5 C / cm 2 and a remanent piezoelectric coefficient d 33,f of 31 pm/V, whereas Mn doping seems more favorite to reduce the leakage current by two order of magnitude. Both doped films exhibited diodelike I-V characteristics, which are correlated with resistance switching effect. © 2010 American Institute of Physics. ͓doi:10.1063/1.3518484͔Due to the increasing environmental and biological concerns on high toxicity of lead present in the widely used Pb͑Zr, Ti͒O 3 ͑PZT͒ family, considerable attention has been drawn to develop lead-free ferroelectric materials in the past two decades. 1 Among various potential lead-free piezoelectric ceramics, A-site complex perovskite ͑Bi 0.5 Na 0.5 ͒TiO 3 ͑BNT͒ is considered to be one of the strong candidates because of its marked ferroelectricity/piezoelectricity. 2,3 The pioneer work by Takenaka et al. 4 demonstrated that rhombohedral ͑F ␣ ͒-tetragonal ͑F ␤ ͒ morphotropic phase boundary ͑MPB͒ in ͑Bi 0.5 Na 0.5 ͒TiO 3 -BaTiO 3 ͑BNBT͒ binary system is remarkably effective in promoting piezoelectric properties. Subsequent studies revealed the piezoelectric performance of BNBT ceramics with MPB composition could be further enhanced by appropriate dopants. [5][6][7] In spite of the numerous studies on BNT-based single crystals and ceramics, literature tackling with the growth and characterization of BNT-based, especially BNBT-based thin films, still remains at an infancy stage. [8][9][10][11][12] Consequently, doping effects on the electrical properties of thin film BNBT materials are still unclear. Abazari et al. 13 has recently reported epitaxial potassium modified BNBT thin films grown on SrRuO 3 coated SrTiO 3 substrates by pulsed laser deposition ͑PLD͒. Dielectric and piezoelectric properties of the films were evaluated macroscopically. However, the nanoscale characterization of piezoresponse of doped BNBT thin films is still missing. In this letter, thin films of La+ Ce codoped and Mn-doped BNBT with composition in the vicinity of MPB are epitaxially deposited on CaRuO 3 ͑CRO͒ electroded ͑LaAlO 3 ͒ 0.3 ͑Sr 2 AlTaO 6 ͒ 0.35 ͑LSAT͒ ͑001͒ singlecrystal substrates by PLD. Effects of dopants on ferroelectric, dielectric, leakage current, and local piezoelectric properties of the BNBT-based thin films are investigated.The 10% Bi-enriched targets of ͑Bi 0.5 Na 0.5 ͒ 0.94 Ba 0.06 TiO 3 + 0.5 mol % CeO 2 + 0.5 mol % La 2 O 3 ͑BNBT-LaCe͒, ͑Bi 0.5 Na 0.5 ͒ 0.94 Ba 0.06 TiO 3 + 0.5 mol % MnO 2 ͑BN-BTMn͒ used for laser ablation were fabricated by the conventional solid state reaction route. The substrates were cubic ͑001͒-oriented LSAT ͑a = 3.868 Å͒, which were first coated a layer of CRO ͑ϳ40 nm͒ by PLD...

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confidence: 99%

Enhanced ferroelectric and piezoelectric properties in doped lead-free (Bi0.5Na0.5)0.94Ba0.06TiO3 thin films

Wang

Chan

et al. 2010

Applied Physics Letters

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“…Especially, the Asite complex perovskite (Na 0.5 Bi 0.5 )TiO 3 (BNT) system have been considered to be one of the most important promising candidates because of its excellent ferroelectric and piezoelectric properties [10][11][12][13][14][15]. BNT thin films have been fabricated on various oxide single-crystal substrates using a broad spectrum of techniques [16][17][18][19][20][21]. However, it is well known that the singlecrystal oxide substrates have high cost and limited sizes.…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric properties of lead-free (Na0.5Bi0.5)0.95Ba0.05TiO3 thin films on polycrystalline nickel foils

Cheng

Liu

et al. 2015

Ceramics International

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“…To prevent the appearance of cracks during aging and drying steps, an appropriate formamide (about 10 : 1 in volume ratio) was added to the above solution as a stabilizing agent. 5 During the whole preparation process, the mixture was stirred constantly at room temperature until a transparent and stable yellow solution with a concentration of 0.26 M, determined by an inductive coupled plasma emission spectrometer (ICP), was obtained. In the preparation, ten percent excess of bismuth and twenty percent excess of sodium/potassium was added to balance out their volatility during the heat treatment process.…”

Section: Materials Synthesismentioning

confidence: 99%

“…[5][6][7][8][9] Some efforts have been undertaken to enhance the energy-storage density of NBT-based lms. For example, Li et al obtained a high energy-storage density of about 13.02 J cm À3 and a medium efficiency of about 44.81% in 0.9(Na 0.5 Bi 0.5 )TiO 3 -0.1PbTiO 3 thin lms due to high electric-eld endurance and enhanced polarizability; 10 Xu et al obtained a large energy density of about 36.1 J cm À3 and a corresponding efficiency of about 40.8% in 0.95(Na 0.5 Bi 0.5 )TiO 3 -0.05SrTiO 3 thick lms.…”

Section: Introductionmentioning

confidence: 99%

Temperature- and frequency-dependent dielectric response and energy-storage performance in high (100)-oriented Sc doped (Na_0.85K_0.15)_0.5Bi_0.5TiO₃ films

Wang

et al. 2017

RSC Adv.

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Highly (100)-oriented (Na 0.85 K 0.15 ) 0.5 Bi 0.5 Ti 0.75 Sc 0.25 O 3 (NKBT-Sc) films with thicknesses ranging from about 460 to 860 nm were grown by utilizing TiO 2 layers engineering. Effects of TiO 2 layers on dielectric properties and energy-storage performances of NKBT-Sc films were investigated in a wide temperature range and a wide frequency range. The TiO 2 layers inserted alternately inside the NKBT-Sc films can enhance the (100) preferred degree of the film and it doesn't decrease with an increase in film thickness.Compared with NKBT-Sc films without TiO 2 layers, the TiO 2 -coated NKBT-Sc films exhibit a great enhancement in electrical properties and energy-storage performance. The best dielectric properties with the largest dielectric constant (3 r ) of about 782 and the lowest dielectric loss (tan d) of about 0.051 at 1 kHz, together with a maximum energy-density (W) of about 22.7 J cm À3 and corresponding efficiency (h) of about 51.5%, were obtained at room temperature in the 860 nm-thickness film with TiO 2 layers coated alternately with NKBT-Sc layers. Moreover, energy-density and the corresponding efficiency of the TiO 2 -coated NKBT-Sc films varied slightly over a temperature range from À150 C to 150 C as well as at a frequency range from 100 Hz to 6 kHz, meaning a greatly enhanced temperature dependent energy-storage stability and a frequency dependent energy-storage stability. In addition, leakage current density (J) of the 860 nm-thickness TiO 2 -coated NKBT-Sc film was maintained at a relatively low value. This also means that it can work in a wide operating temperature. This much enhanced energy-storage density and good temperature stability make NKBT-Sc films to be a promising lead-free material for energy storage capacitor applications.

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Dielectric and piezoelectric properties of lead-free (Bi,Na)TiO3-based thin films

Cited by 107 publications

References 22 publications

Enhanced ferroelectric and piezoelectric properties in doped lead-free (Bi0.5Na0.5)0.94Ba0.06TiO3 thin films

Enhanced ferroelectric and piezoelectric properties in doped lead-free (Bi0.5Na0.5)0.94Ba0.06TiO3 thin films

Piezoelectric properties of lead-free (Na0.5Bi0.5)0.95Ba0.05TiO3 thin films on polycrystalline nickel foils

Temperature- and frequency-dependent dielectric response and energy-storage performance in high (100)-oriented Sc doped (Na_0.85K_0.15)_0.5Bi_0.5TiO₃ films

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Dielectric and piezoelectric properties of lead-free (Bi,Na)TiO3-based thin films

Cited by 107 publications

References 22 publications

Enhanced ferroelectric and piezoelectric properties in doped lead-free (Bi0.5Na0.5)0.94Ba0.06TiO3 thin films

Enhanced ferroelectric and piezoelectric properties in doped lead-free (Bi0.5Na0.5)0.94Ba0.06TiO3 thin films

Piezoelectric properties of lead-free (Na0.5Bi0.5)0.95Ba0.05TiO3 thin films on polycrystalline nickel foils

Temperature- and frequency-dependent dielectric response and energy-storage performance in high (100)-oriented Sc doped (Na0.85K0.15)0.5Bi0.5TiO3 films

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Temperature- and frequency-dependent dielectric response and energy-storage performance in high (100)-oriented Sc doped (Na_0.85K_0.15)_0.5Bi_0.5TiO₃ films