Ultrahigh strain and piezoelectric behavior in relaxor based ferroelectric single crystals

Park, Seung Eek; Shrout, Thomas R.

doi:10.1063/1.365983

Cited by 3,910 publications

(2,464 citation statements)

References 12 publications

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“…An emerging trend is that magnetostriction enhancement in Fe based systems occurs for compositions near structural phase boundaries. An analogy with giant electrostriction of ferroelectric solid solution and relax ors 22,23 also points to the intriguing possibility that some structural boundaries in magnetic materials can act as property enhancing morphotropic phase boundaries. Indeed, Yang et al have reported a rhombohedral/tetragonal morphotropic phase boundary with enhanced magnetostrictive properties in the TbCo 2 -DyCo 2 sys tem occurring below 160 K (ref.…”

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confidence: 95%

Giant magnetostriction in annealed Co1−xFex thin-films

et al. 2011

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Chemical and structural heterogeneity and the resulting interaction of coexisting phases can lead to extraordinary behaviours in oxides, as observed in piezoelectric materials at morphotropic phase boundaries and relaxor ferroelectrics. However, such phenomena are rare in metallic alloys. Here we show that, by tuning the presence of structural heterogeneity in textured Co 1 − x Fe x thin films, effective magnetostriction λ eff as large as 260 p.p.m. can be achieved at lowsaturation field of ~10 mT. Assuming λ 100 is the dominant component, this number translates to an upper limit of magnetostriction of λ 100 ≈ 5λ eff > 1,000 p.p.m. microstructural analyses of Co 1 − x Fe x films indicate that maximal magnetostriction occurs at compositions near the (fcc + bcc)/bcc phase boundary and originates from precipitation of an equilibrium Co-rich fcc phase embedded in a Fe-rich bcc matrix. The results indicate that the recently proposed heterogeneous magnetostriction mechanism can be used to guide exploration of compounds with unusual magnetoelastic properties.

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confidence: 95%

Giant magnetostriction in annealed Co1−xFex thin-films

et al. 2011

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“…The BEC tensor (zz component) of the Zn ion increases marginally from B1.93 to B2.04 (by 5.1%) upon the transition to the polar P6 3 mc structure from the nonpolar P6 3 /mmc structure. The enhanced BEC value of the P6 3 mc structure is strongly correlated with the ionic contribution to e 33 because the BEC is represented by the term (qP 3 /qu) e 3 in eqn (2). Thus, the Zn offcenter-dependent BEC tensor is expected to correlate well with the variation in the ionic contribution to e 33 .…”

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confidence: 96%

Atomic-scale origin of piezoelectricity in wurtzite ZnO

Lee

et al. 2015

Phys. Chem. Chem. Phys.

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ZnO has been extensively studied by virtue of its remarkably high piezoelectric responses, especially in nanowire forms. Currently, the high piezoelectricity of wurtzite ZnO is understood in terms of the covalent-bonding interaction between Zn 3d and O 2p orbitals. However, the Zn 3d orbitals are not capable of forming hybridized orbitals with the O 2p z orbitals since the Zn ion is characterized by fully filled non-interacting 3d orbitals. To resolve this puzzling problem, we have investigated the atomicscale origin of piezoelectricity by exploiting density-functional theory calculations. On the basis of the computed orbital-resolved density of states and the band structure over the G-M first Brillouin zone, we propose an intriguing bonding mechanism that accounts for the observed high piezoelectricityintra-atomic 3d z 2-4p z orbital self-mixing of Zn, followed by asymmetric hybridization between the Zn 3d z 2-4p z self-mixed orbital and the O 2p z orbital along the polar c-axis of the wurtzite ZnO.

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“…[1][2][3] These characteristic properties are advantageous for applications for supercapacitors, and ultrasonic motors, piezoelectric boosters, medical ultrasonic probes, and so forth. 4,5) Most of the relaxor materials have a complex perovskitetype structure, which has a random or ordered arrangement of two B-site cations with different radii and ionic charges.…”

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confidence: 99%

Strain-induced nanostructure of Pb(Mg_1/3Nb_2/3)O₃–PbTiO₃on SrTiO₃epitaxial thin films with low PbTiO₃concentration

Kiguchi

Fan

Shiraishi

et al. 2017

Jpn. J. Appl. Phys.

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The singularity of the structure in (1 % x)Pb(Mg 1/3 Nb 2/3 )O 3 -xPbTiO 3 (PMN-xPT) (x = 0-50 mol %) epitaxial thin films of 100 nm thickness was investigated from the viewpoint of the localized residual strain in the nanoscale. The films were deposited on SrTiO 3 (STO) (001) single-crystal substrates by chemical solution deposition (CSD) using metallo-organic decomposition (MOD) solutions. X-ray and electron diffraction patterns revealed that PMN-xPT thin films included a single phase of the perovskite-type structure with the cube-on-cube orientation relationship between PMN-xPT and STO: (001) Film k (001) Sub , [100] Film k [100] Sub . X-ray reciprocal space maps showed an in-plane tensile strain in all the compositional ranges considered. Unit cells in the films were strained from the rhombohedral (pseudocubic) (R) phase to a lower symmetry crystal system, the monoclinic (M B ) phase. The morphotropic phase boundary (MPB) that split the R and tetragonal (T) phases was observed at x = 30-35 for bulk crystals of PMN-xPT, whereas the strain suppressed the transformation from the R phase to the T phase in the films up to x = 50. High-angle annular dark field-scanning transmission electron microscopy (HAADF-STEM) analysis and its related local strain analysis revealed that all of the films have a bilayer morphology. The nanoscale strained layer formed only above the film/substrate semi-coherent interface. The misfit dislocations generated the localized and periodic strain fields deformed the unit cells between the dislocation cores from the R to an another type of the monoclinic (M A ) phase. Thus, the singular and localized residual strains in the PMN-xPT/STO (001) epitaxial thin films affect the phase stability around the MPB composition and result in the MPB shift phenomena.

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Ultrahigh strain and piezoelectric behavior in relaxor based ferroelectric single crystals

Cited by 3,910 publications

References 12 publications

Giant magnetostriction in annealed Co1−xFex thin-films

Giant magnetostriction in annealed Co1−xFex thin-films

Atomic-scale origin of piezoelectricity in wurtzite ZnO

Strain-induced nanostructure of Pb(Mg_1/3Nb_2/3)O₃–PbTiO₃on SrTiO₃epitaxial thin films with low PbTiO₃concentration

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Ultrahigh strain and piezoelectric behavior in relaxor based ferroelectric single crystals

Cited by 3,910 publications

References 12 publications

Giant magnetostriction in annealed Co1−xFex thin-films

Giant magnetostriction in annealed Co1−xFex thin-films

Atomic-scale origin of piezoelectricity in wurtzite ZnO

Strain-induced nanostructure of Pb(Mg1/3Nb2/3)O3–PbTiO3on SrTiO3epitaxial thin films with low PbTiO3concentration

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Strain-induced nanostructure of Pb(Mg_1/3Nb_2/3)O₃–PbTiO₃on SrTiO₃epitaxial thin films with low PbTiO₃concentration