Domain relaxation exhibited by ferroelectric low symmetry polymorphs in BaTiO3

Jaffari, G. Hassnain; Zafar, Adeel; Ali, Awais

doi:10.1016/j.physb.2020.412750

Cited by 2 publications

(1 citation statement)

References 22 publications

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“…BT has a tetragonal crystal structure at normal temperature. The crystal structure changes with temperature and undergoes three structural transformations; a) rhombohedral (𝑅𝑅3𝑚𝑚) -orthorhombic (𝐴𝐴𝑚𝑚𝑚𝑚2) transition around -90 o C, b) orthorhombic -tetragonal (𝑃𝑃4𝑚𝑚𝑚𝑚) transition around 5 o C, and c) tetragonal -cubic (𝑃𝑃𝑚𝑚3 � 𝑚𝑚) transition around 130 o C [8][9][10][11], which known as Curie temperature (T c ). The structure and properties of BT can further be influenced via doping at A-and B-sites with suitable elements [12,13].…”

Section: Introductionmentioning

confidence: 99%

Structural, Dielectric and Ferroelectric Characterizations of Sol-gel Prepared Ba_1-xSr_xTiO₃ Nanoceramics

Singh

Dixit

Dobal

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Ba1-xSrxTiO3 (0.0 ≤ x ≤ 0.5) nanoceramics were synthesized via sol-gel route and the structural and electric properties of the resulting compositions were investigated. revealed A tetragonal crystal structures for x = 0.0 - 0.3 and a cubic structure for x = 0.5 compositions was revealed by X-ray diffraction. The smaller ionic radii of Sr ions resulted in the lowering of c/a ratio with increasing x and a tetragonal to cubic structural transformation was observed at around x = 0.4. The average crystallite size gradually decreased with increasing x from 0 to 0.5. This trend was visible in electron micrographs. The room temperature dielectric constant in these nanoceramics increases with increasing Sr and a maximum value of 1553 was observed for x=0.3. Curie temperature (Tc ) of 125 °C was obtained for x=0.0, which shifted toward lower temperature with increasing x value. The value of Tc was observed as 100 and 75 °C for x = 0.1 and 0.3, respectively. The remnant polarization (Pr ), saturation polarization (Ps ), and coercive field (Ec ) decreased with increasing Sr concentration in BT due to the structural modifications. Value of Pr decreases from 0.637 to 0.229 μC/cm2, Ps decreases from 8.910 to 3.238 μC/cm2 and Ec decreases from 0.631 to 0.255 kV/cm with increasing x from 0 to 0.5.

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Section: Introductionmentioning

confidence: 99%

Structural, Dielectric and Ferroelectric Characterizations of Sol-gel Prepared Ba_1-xSr_xTiO₃ Nanoceramics

Singh

Dixit

Dobal

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Effect of Structural Changes on the Electrical Properties of Sol-gel derived Iron Doped Barium Titanate

Singh

Dixit

Dobal

2021

J. Phys.: Conf. Ser.

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BaTi1-xFexO3 compositions for x = 0.0 - 0.5 were successfully synthesized using solgel method and the structural, dielectric, ferroelectric, and ferromagnetic properties of these compositions were studied. X-Ray diffraction patterns revealed a tetragonal phase in x=0.0 composition which changed to the hexagonal phase in x = 0.4 and 0.5 compositions. The co-existence of tetragonal and hexagonal phases was observed in iron doped samples up to x= 0.3. The difference in ionic radii of Ti and Fe ions was responsible for changing c/a ratio. Average grain size was found gradually increasing with Fe content in these compositions and was also observed in SEM micrographs. The dielectric constant and tangent loss were found decreasing with Fe concentration. The values of remnant and saturation polarizations decreased whereas that of saturation magnetization increased with an increasing content of Fe in barium titanate.

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Domain relaxation exhibited by ferroelectric low symmetry polymorphs in BaTiO3

Cited by 2 publications

References 22 publications

Structural, Dielectric and Ferroelectric Characterizations of Sol-gel Prepared Ba_1-xSr_xTiO₃ Nanoceramics

Structural, Dielectric and Ferroelectric Characterizations of Sol-gel Prepared Ba_1-xSr_xTiO₃ Nanoceramics

Effect of Structural Changes on the Electrical Properties of Sol-gel derived Iron Doped Barium Titanate

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Domain relaxation exhibited by ferroelectric low symmetry polymorphs in BaTiO3

Cited by 2 publications

References 22 publications

Structural, Dielectric and Ferroelectric Characterizations of Sol-gel Prepared Ba1-xSrxTiO3 Nanoceramics

Structural, Dielectric and Ferroelectric Characterizations of Sol-gel Prepared Ba1-xSrxTiO3 Nanoceramics

Effect of Structural Changes on the Electrical Properties of Sol-gel derived Iron Doped Barium Titanate

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Product

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Structural, Dielectric and Ferroelectric Characterizations of Sol-gel Prepared Ba_1-xSr_xTiO₃ Nanoceramics

Structural, Dielectric and Ferroelectric Characterizations of Sol-gel Prepared Ba_1-xSr_xTiO₃ Nanoceramics