Structural and piezoelectric characteristics of BNT–BT0.05 thin films processed by sol–gel technique

Cernea, Marin; Trupina, L.; Drǎgoi, C.; Vasile, Bogdan Ștefan; Trușcă, Roxana

doi:10.1016/j.jallcom.2011.11.129

Cited by 72 publications

(37 citation statements)

References 33 publications

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“…Since Takenaka et al [5,[23][24][25] first reported the piezoelectric properties of (1 − x)(Bi 0.5 Na 0.5 )TiO 3 -xBaTiO 3 (BNT-BT), polycrystalline ceramics and films of BNT-BT have been extensively studied to improve the piezoelectric performance, to investigate the phase diagram [24,[26][27][28], the domain structure [29,30], and the relaxor behavior [31][32][33][34][35], and to elucidate the effect of the application of E [27,28] etc. Single crystals of BNT-BT have been grown and the influence on dc-bias E on the phase stability [36] and the diffuse X-ray scattering [37] have been investigated.…”

Section: Open Accessmentioning

confidence: 99%

Polarization Rotation and Monoclinic Distortion in Ferroelectric (Bi0.5Na0.5)TiO3–BaTiO3 Single Crystals under Electric Fields

et al. 2014

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Abstract:The features of the crystal structures and spontaneous polarization (P s ) under an electric field (E) have been reviewed for (1 − x)(Bi 0.5 Na 0.5 )TiO 3 -xBaTiO 3 (BNT-BT). In-situ measurements of high-resolution synchrotron radiation X-ray diffraction (SR-XRD) under electric fields show that single crystals with x = 0 (BNT) and 5% have a monoclinic distortion in space group Cc at 25 °C. The SR-XRD study combined with density functional theory (DFT) calculations demonstrates that BNT-5%BT exhibits a rotation of P s in the monoclinic a-c plane by 2° under an E of 70 kV/cm along the <001> pseudo-cubic direction, which is much larger than BNT.

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Section: Open Accessmentioning

confidence: 99%

Polarization Rotation and Monoclinic Distortion in Ferroelectric (Bi0.5Na0.5)TiO3–BaTiO3 Single Crystals under Electric Fields

et al. 2014

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“…A little asymmetric behavior of the CV loop is due to the different deposition method used at top and bottom interfaces. 24) It is well known that the influence of DC bias field on the dielectric properties is mainly due to the pinning effect of DC bias field on the domain wall mobility. 33) We measured the dielectric constant under the DC bias field up to 300 kV/cm, as the motion of domain wall can be restricted by the DC bias field when the field is larger than the coercive field.…”

Section: )mentioning

confidence: 99%

“…As reported, chemical solution deposition, 16), 19) pulse laser deposition, 1),20),21) RF magnetron sputtering, 22) metal organic decomposition 23) and solgel deposition 24) are among the most widely used methods to fabricate the BNTBT thin films. The solgel method can offer good stoichiometry control of the film composition.…”

Section: Introductionmentioning

confidence: 99%

Investigation of thickness dependence of electric properties of sol–gel BNT–BT thin films with stepwise crystallization

Cui

Wang

et al. 2016

J. Ceram. Soc. Japan

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6% BaTiO 3 -doped Na 0.5 Bi 0.5 TiO 3 (BNTBT) lead-free piezoelectric thin films with the composition around morphotropic phase boundary (MPB) were spin-coated via an economical water-based solgel method on Pt(111)/Ti/SiO 2 /Si substrates. High-quality BNTBT thin films with the thickness ranging from 120 to 560 nm were synthesized by stepwise crystallization process, and the thickness effect on structures and electric properties were investigated. Two theoretical models are used to analyze the ferroelectric results. Intrinsic contribution and extrinsic contribution alternatively dominates under different conditions in the BNTBT thin film. The piezoelectric properties of BNTBT thin films were found to change monotonically with the increase of the thickness. The largest effective piezoelectric constant (d 33 ) of the BNTBT thin films can reach the value of 97.7 pm/V for the film with the thickness of 560 nm.

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“…[42,43] It is a wellknown lead-free ferroelectric material and has been extensively documented in the literature recently. [44][45][46][47][48][49][50][51] BNT-BTs morphotropic phase boundary extends from 5 to 7 mol % BT.…”

Section: And2mentioning

confidence: 99%

Enhanced Electrocaloric Effect in Pre‐stressed Ferroelectric Materials

2015

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The effect of mechanical uniaxial stress on the electrocaloric behavior of ferroelectric materials has been analyzed. The magnitude of the electrocaloric effect was enhanced using controlled uniaxial stress. This study was performed for two classes of ferroelectric materials: 94(Bi1/2Na1/2)TiO3–6BaTiO3 (BNT–BT) bulk ceramics and Pb(Mn1/3Nb2/3)O3–32PbTiO3 (PMN–32PT) single crystals. Indirect measurements were made for pre‐stressed materials by using ferroelectric hysteresis loops and Maxwell’s relations. Peak adiabatic temperature changes of approximately 3 K and 0.65 K were obtained for BNT–BT and PMN–32PT materials, respectively. These values represent significant improvements (73 % and 200 %) over those obtained under unstressed conditions. The electrocaloric effect (ECE) could be harnessed in these materials for environmentally friendly refrigeration systems.

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Structural and piezoelectric characteristics of BNT–BT0.05 thin films processed by sol–gel technique

Cited by 72 publications

References 33 publications

Polarization Rotation and Monoclinic Distortion in Ferroelectric (Bi0.5Na0.5)TiO3–BaTiO3 Single Crystals under Electric Fields

Polarization Rotation and Monoclinic Distortion in Ferroelectric (Bi0.5Na0.5)TiO3–BaTiO3 Single Crystals under Electric Fields

Investigation of thickness dependence of electric properties of sol–gel BNT–BT thin films with stepwise crystallization

Enhanced Electrocaloric Effect in Pre‐stressed Ferroelectric Materials

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Structural and piezoelectric characteristics of BNT–BT0.05 thin films processed by sol–gel technique

Cited by 72 publications

References 33 publications

Polarization Rotation and Monoclinic Distortion in Ferroelectric (Bi0.5Na0.5)TiO3–BaTiO3 Single Crystals under Electric Fields

Polarization Rotation and Monoclinic Distortion in Ferroelectric (Bi0.5Na0.5)TiO3–BaTiO3 Single Crystals under Electric Fields

Investigation of thickness dependence of electric properties of sol&ndash;gel BNT&ndash;BT thin films with stepwise crystallization

Enhanced Electrocaloric Effect in Pre‐stressed Ferroelectric Materials

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Investigation of thickness dependence of electric properties of sol–gel BNT–BT thin films with stepwise crystallization