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- W2014793145 abstract "It has been a goal to find high dielectric permittivity and Curie temperature in high-strain crystals to enhance piezoelectric coefficient and thermal stability. Dielectric permittivity has been measured as functions of temperature and frequency in (001)-cut Pb(Fe <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>1/2</sub> Nb <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>1/2</sub> ) <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>1-x</sub> Ti <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>x</sub> O <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> (PFNTx) single crystals with starting composition at x=0.48. The tetragonal PFNT single crystals exhibit giant dielectric permittivity, high Curie (or depolarization) temperature, and low electric resistance, which are sensitive to Fe ion content, measured frequency, and thermal annealing treatment. A first-order-type tetragonalrarrcubic phase transition takes place at T <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>C</sub> cong515 K. Ac electric conductivity increases with temperature dramatically, likely due to vacancy hopping and valance reduction of Fe3+ to Fe2+ ions. This study suggests that Fe ion is a promising candidate for dopant to enhance dielectric permittivity and depolarization temperature in Pb(Mg <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>1/3</sub> Nb <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2/3</sub> ) <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>1-x</sub> TixO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> (PMNT) and Pb(Zn <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>1/3</sub> Nb <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2/3</sub> ) <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>1-x</sub> TixO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> (PZNT) crystals." @default.
- W2014793145 created "2016-06-24" @default.
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- W2014793145 date "2007-05-01" @default.
- W2014793145 modified "2023-09-24" @default.
- W2014793145 title "Colossal Dielectric Permittivity in Tetragonal Pb(Fe<inf>1/2</inf>Nb<inf>1/2</inf>)<inf>1-x</inf>Ti<inf>x</inf>O<inf>3</inf> Single Crystals" @default.
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- W2014793145 doi "https://doi.org/10.1109/isaf.2007.4393334" @default.
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