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- W4384008202 abstract "Abstract The domain configuration contributions to the DC bias characteristics of nanograined BaTiO 3 were clarified. Domain boundaries became more ambiguous with decreasing grain size ( g.s. ), whereas domain patterns partially vanished because of the reduction in BT ferroelectricity, in the g.s. range <1 μ m. Additionally, intergranular stress increased with decreasing g.s. , resulting in crystal lattice hardening in the vicinity of the domain walls (DWs) and suppression of dipole fluctuations in the DWs. These domain structural variations with the domain size ( d.s. ) reduced permittivity in the absence of a DC electric field, resulting in improvements in permittivity depressions in an electric field (Δ ε ). Magnesium substitution slightly decreased the d.s . The increase in DW density upon Mg loading implied defect pairs, <?CDATA ${{rm{Mg}}}_{{rm{Ti}}}^{}$?> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML overflow=scroll> <mml:msubsup> <mml:mrow> <mml:mi mathvariant=normal>Mg</mml:mi> </mml:mrow> <mml:mrow> <mml:mi mathvariant=normal>Ti</mml:mi> </mml:mrow> <mml:mrow> <mml:mo></mml:mo> </mml:mrow> </mml:msubsup> </mml:math> – <?CDATA ${{rm{V}}}_{{rm{o}}}^{bullet bullet },$?> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML overflow=scroll> <mml:msubsup> <mml:mrow> <mml:mi mathvariant=normal>V</mml:mi> </mml:mrow> <mml:mrow> <mml:mi mathvariant=normal>o</mml:mi> </mml:mrow> <mml:mrow> <mml:mi>•</mml:mi> <mml:mi>•</mml:mi> </mml:mrow> </mml:msubsup> <mml:mo>,</mml:mo> </mml:math> which acted as new DW pinning centers, thereby subdividing the DWs. The Δ ε notably improved via Mg loading, because a defect pair effectively pins the DWs under the electric field." @default.
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- W4384008202 date "2023-08-01" @default.
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- W4384008202 title "Polarization contributions to DC bias characteristics of nanograined BaTiO<sub>3</sub>-based ceramics" @default.
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