Ultrahigh electromechanical response in (1−<i>x</i>)(Na0.5Bi0.5)TiO3-<i>x</i>BaTiO3 single-crystals via polarization extension

Ge, Wenwei; Luo, Congcong; Zhang, Qinhui; Devreugd, Christopher P.; Ren, Yang; Li, Jiefang; Luo, Haosu; Viehland, Dwight

doi:10.1063/1.4709619

Cited by 60 publications

(33 citation statements)

References 47 publications

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“…The phase with a P4bm space group is recently reported to reversibly/irreversibly transforms into the strongly polar ferroelectric tetragonal phase with P4mm space group on applying an <100> directional electric ( E ) -field more than a threshold 16–19 . This phase transition is accompanied by a large lattice elongation/polarization extension, resulting in a very high electromechanical strain ( d 33 * reaches up to 2500 pm/V) 18 .…”

Section: Introductionmentioning

confidence: 99%

High electromechanical strain and enhanced temperature characteristics in lead-free (Na,Bi)TiO3–BaTiO3 thin films on Si substrates

Tanaka

Okada

Hashimoto

et al. 2018

Sci Rep

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Here, we demonstrate the high electromechanical strain and enhanced temperature characteristics in the c-axis-oriented lead-free (Na,Bi)TiO3–BaTiO3 (NBT–BT) polycrystalline thin film prepared on Si substrates by rf magnetron sputtering. The effective transverse piezoelectric coefficient, e31*, estimated from the electromechanical strain measured under high electric field, reaches a high level of −12.5 C/m2, and is comparable to those of conventional Pb(Zr,Ti)O3 films. In-situ X-ray diffraction measurement and electron diffraction analysis revealed the electromechanical strain of the NBT–BT film to originate predominantly in elongation of the tetragonal (P4bm) crystal lattice in the c-axis direction. In addition to the large e31*, the NBT–BT film exhibits enhanced permittivity maximum temperature, Tm, of ~400 °C and no depolarization below Tm, as compared to bulk NBT–BT having Tm ≈ 300 °C and a depolarization temperature of ~100 °C. We conclude that the enhancement of temperature characteristics is associated with the distorted P4bm crystal lattice formed by deposition-induced stress and defects. We believe that the present study paves the way for practical applications of lead-free piezoelectric thin films in electromechanical devices.

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Section: Introductionmentioning

confidence: 99%

High electromechanical strain and enhanced temperature characteristics in lead-free (Na,Bi)TiO3–BaTiO3 thin films on Si substrates

Tanaka

Okada

Hashimoto

et al. 2018

Sci Rep

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“…11 The E-field induced pseudo-cubic!T transformation along [001] yields a strain as high as e ¼ 0.6% under E dc ¼ 20 kV/cm, 11,12 which is 3 times larger than the typical strains of lead zirconate titanate (PZT) ceramics. 18 In order to take full advantage of this high strain in polycrystalline materials, [001] textured NBT-x%BT ceramics have recently been developed.…”

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confidence: 99%

Alternating and direct current field effects on the structure-property relationships in Na0.5Bi0.5TiO3-x%BaTiO3 textured ceramics

Maurya

et al. 2013

Applied Physics Letters

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The influence of alternating (ac) and direct current (dc) fields on the structural and dielectric properties of [001]PC textured Na0.5Bi0.5TiO3-7%BaTiO3 (NBT-7%BT) ceramics has been investigated. X-ray diffraction measurements revealed that the depolarization at temperature Td in poled samples resulted from a tetragonal → pseudo-cubic transition on heating. Moderate ac drive and dc bias had opposite influences on Td: ac drive decreased the Td, whereas dc bias increased it. These investigations suggested an effective method to expand the working temperature range of NBT-x%BT textured ceramics to a high temperature.

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“…As previously discussed, the release of polarization extension plays a unique role in improving piezoelectricity near a polarnonpolar phase boundary, for instance in the ferroelectric BT near the Curie temperature, the polar AlN doped with nonpolar ScN and also (1x)(Na 0.5 Bi 0.5 )TiO 3 -xBaTiO 3 single crystals. 13,[21][22][23] Identical significance also applies to the PMNT and PZT system. For PMNT deep in the tetragonal phase, where d 15 is relatively small, the term containing d 33 in Eq.…”

Section: Introductionmentioning

confidence: 99%

Composition driven structural instability in perovskite ferroelectrics

Liu

Yan

et al. 2017

AIP Advances

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Ferroelectric solid solutions usually exhibit enhanced functional properties at the morphotropic phase boundary separating two ferroelectric phases with different orientations of polarization. The underlying mechanism is generally associated with polarization rotational instability and the flattened free energy profile. In this work we show that the polarization extensional instability can also be induced at the morphotropic phase boundary beyond the reported polar-nonpolar phase boundary. The piezoelectricity enhanced by this mechanism exhibits excellent thermal stability, which helps to develop high performance piezoelectric materials with good temperature stability.

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Ultrahigh electromechanical response in (1−x)(Na0.5Bi0.5)TiO3-xBaTiO3 single-crystals via polarization extension

Cited by 60 publications

References 47 publications

High electromechanical strain and enhanced temperature characteristics in lead-free (Na,Bi)TiO3–BaTiO3 thin films on Si substrates

High electromechanical strain and enhanced temperature characteristics in lead-free (Na,Bi)TiO3–BaTiO3 thin films on Si substrates

Alternating and direct current field effects on the structure-property relationships in Na0.5Bi0.5TiO3-x%BaTiO3 textured ceramics

Composition driven structural instability in perovskite ferroelectrics

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