6.1% Volumetric Negative Thermal Expansion Induced by the Reversible Reconstructive Phase Transition in Pb-Free Bi<sub>1-</sub> <sub>x</sub>Ln<sub>x</sub>CoO<sub>3</sub> (Ln: Lanthanoid). [PDF]
Adv Sci (Weinh)Perovskite‐type oxide lanthanoid‐substituted BiCoO3 exhibits a reversible negative thermal expansion (NTE) originated from the coordination change from the CoO5 pyramid to the CoO6 octahedron due to melting of the dxy orbital ordering in the d6 electron configuration, and the 6.1% volume shrinkage in Bi0.82Nd0.18CoO3 is the largest ever observed in the
Sakai Y +10 more
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Polarization Dynamics in Ferroelectrics: Insights Enabled by Machine Learning Molecular Dynamics. [PDF]
Adv Sci (Weinh)Machine learning molecular dynamics is presented as a route to capture polarization switching, domain wall kinetics, topological polar textures, and polar mechanical coupling beyond the limits of conventional atomistic methods. This Perspective surveys recent progress and identifies key methodological directions, including long‐range electrostatics ...
Bai D, He R, Liu J, Kou L.
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Piezoelectric response of nanoscale PbTiO3 in composite PbTiO3−CoFe2O4 epitaxial films [PDF]
Applied Physics Letters, 2008 Piezoelectric properties of PbTiO3 in 1/3PbTiO3−2/3CoFe2O4 transverse epitaxial nanostructures on differently oriented SrTiO3 were analyzed using conventional and switching-spectroscopy piezoelectric force microscopy. The results confirmed that the individual PbTiO3 nanocolumns in the CoFe2O4 matrix exhibit a detectable piezoelectric response ...
Zhuopeng Tan +7 more
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Structural and dielectric study of the Na0.5Bi0.5TiO3–PbTiO3 and K0.5Bi0.5TiO3–PbTiO3 systems [PDF]
Journal of Materials Chemistry, 1997 A study of the Na 0.5 Bi 0.5 TiO 3 –PbTiO 3 and K 0.5 Bi 0.5 TiO 3 -PbTiO 3 systems has been carried out using X-ray diffraction, differential scanning calorimetry and dielectric measurements. The limits of the rhombohedral (Na 0.5 Bi 0.5 TiO 3 -rich side) and tetragonal (PbTiO 3 -rich side ...
Elkechai, Omar +4 more
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Theory of PbTiO3, BaTiO3, and SrTiO3 surfaces [PDF]
Faraday Discussions, 1999 First-principles total-energy calculations are carried out for (001) surfaces of the cubic perovskite ATiO3 compounds PbTiO3, BaTiO3, and SrTiO3. Both AO-terminated and TiO2-terminated surfaces are considered, and fully-relaxed atomic configurations are determined.
Meyer, B. +2 more
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Colossal Photovoltaic Current in Ferroelectric Oxide by Constructing Defect Band. [PDF]
Adv Sci (Weinh)Colossal photovoltaic current density of 34.36 mA/cm2 under 375 nm illumination has been achieved in the Pb‐deficient PbTiO3 film. The ultraviolet photoresponsivity surpasses that of all reported ferroelectric materials. This enhancement is attributed to the junction effect between the Pb‐deficient and non‐defective layers.
Sun Y +16 more
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Perovskite lead-based oxide anodes for rechargeable batteries
Electrochemistry Communications, 2021 Lead-based perovskites (PbTiO3 and PbZrO3) are introduced as novel anode materials for non-aqueous M-ion rechargeable batteries (M = Li, Na, K). These compounds were scalably prepared by conventional solid-state (dry) and combustion (wet) routes.
Anshuman Chaupatnaik, Prabeer Barpanda
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Perovskite solid solutions with multiferroic morphotropic phase boundaries and property enhancement [PDF]
Journal of Advanced Dielectrics, 2016 Recently, large phase-change magnetoelectric response has been anticipated by a first-principles investigation of phases in the BiFeO3–BiCoO3 perovskite binary system, associated with the existence of a discontinuous morphotropic phase boundary (MPB ...
M. Algueró +6 more
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Influence of KF substitution on the ferroelectric phase transition of lead titanate single crystals studied by Brillouin light scattering [PDF]
Journal of Advanced Dielectrics, 2015 The elastic properties of KF-substituted perovskite lead titanate (PbTiO3) were investigated by dielectric measurements and Brillouin light scattering. The ferroelectric phase transition occurred at substantially lower temperature due to KF substitution,
Seonhyeop Shin +5 more
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Absence of critical thickness for polar skyrmions with breaking the Kittel’s law
Nature Communications, 2023 The period of polar domain (d) in ferroics was commonly believed to scale with corresponding film thicknesses (h), following the classical Kittel’s law of d ∝ $$\sqrt{h}$$ h .
Feng-Hui Gong +7 more
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