Study of structural, dielectric, ferroelectric and magnetic properties of vanadium doped BCT ceramics

Sharma, Preeti; Berwal, Neelam; Ahlawat, Neetu; Maan, A. S.; Punia, R.

doi:10.1016/j.ceramint.2019.07.013

Cited by 28 publications

(6 citation statements)

References 33 publications

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“…It is clearly observed that, for each sample, when the electric eld changes from 10 to 20 kV/cm, the bigger and more saturated P-E hysteresis loops appear. The above phenomena may be caused by the enhancing of the stability of the ordered ferroelectric domains as the electric eld increases [39]. For pure BT, roughly the standard hysteresis loops can be observed, which demonstrate the ferroelectric properties of ceramics [47,48].…”

Section: Resultsmentioning

confidence: 88%

“…This may be caused by some stresses during calcination by solid solution reaction, which hinders the movement of the grain boundary and thus reduces the grain size [37,38]. It is also possible that due to the incorporation of SFN, the mismatch between Fe, Nb and Ti with different ion radii at the B-site leads to the increase of lattice distortion, thus inhibiting the growth of grains [39,40].…”

Section: Resultsmentioning

confidence: 99%

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Band gap narrowing and electrical properties of (1-x)BaTiO3-xSrFe0.5Nb0.5O3 lead-free ceramics

Chen

Deng

Zheng

et al. 2021

J Mater Sci: Mater Electron

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The composite materials in the form of (1-x)BaTiO 3 -xSrFe 0.5 Nb 0.5 O 3 ((1-x)BT-xSFN) are synthesized via the solid-state reaction route. Structure, optical behaviors and electrical properties of (1-x)BT-xSFN are studied. It can be noted that the structure of the synthesized solid solution changes from the tetragonal phase to the cubic phase with increase of x-value. Due to the increase in content of double perovskite SFN, the optical band gaps of doped BT decrease to a minimum of 2.66 eV, which is smaller than that of pure BT (3.21 eV). However, the ferroelectric property deteriorates with the addition of dopants, which result from the lattice distortion caused by the substitution of Sr 2+ and Fe 3+ /Nb 5+ for Ba 2+ and Ti 4+ , respectively. These results provide new insights into the control of the structure, optical behaviors and ferroelectric properties in BT-based oxides.

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Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Band gap narrowing and electrical properties of (1-x)BaTiO3-xSrFe0.5Nb0.5O3 lead-free ceramics

Chen

Deng

Zheng

et al. 2021

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

Band Gap Narrowing and Electrical Properties of (1-x)BaTiO3-xSrFe0.5Nb0.5O3 Lead-Free Ceramics

Chen

Deng

Zheng

et al. 2021

Preprint

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The composite materials in the form of (1-x)BaTiO3-xSrFe0.5Nb0.5O3((1-x)BT-xSFN) are synthesized via the solid-state reaction route. Structure, optical behaviors and electrical properties of (1-x)BT-xSFN are studied. It can be noted that the structure of the synthesized solid solution changes from the tetragonal phase to the cubic phase with increase of x-value. Due to the increase in content of double perovskite SFN, the optical band gaps of doped BT decrease to a minimum of 2.66 eV, which is smaller than that of pure BT (3.21 eV). However, the ferroelectric property deteriorates with the addition of dopants, which result from the lattice distortion caused by the substitution of Sr2+ and Fe3+/Nb5+ for Ba2+ and Ti4+, respectively. These results provide new insights into the control of the structure, optical behaviors and ferroelectric properties in BT-based oxides.

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“…Moreover, the low temperature FE-FE transition, which shows the step-like diffused dielectric permittivity anomaly, shifts from 300 to 100 K when the Ca content increases up to x = 0.20. The features markedly affected by the Ca ions doping are still not understood [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Crossover from Ferroelectric to Relaxor Behavior in Ba1−xCaxTiO3 (x = 0.17) System

et al. 2020

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The dielectric properties of Ba1−xCaxTiO3 (x = 0.17) ceramics were studied in a wide frequency range of 20 Hz–53 GHz. Diffused ferroelectric phase transition was revealed close to 339 K in the dielectric properties of ceramics. The behaviour of distributions of relaxation times in vicinity of the ferroelectric phase transition temperature is also typical for order-disorder ferroelectric phase transition. However, at lower temperatures (below 200 K), the most probable relaxation increased according to the Arrhenius law. At lower temperatures the maximum of the imaginary part of dielectric permittivity versus temperature strongly shifted to higher temperatures when the frequency increased (from 125 K at 1.21 kHz to 300 K at 33 GHz). This behaviour was attributed to the dynamics of Ti ions. The origin of the crossover from ferroelectric to relaxor behaviour of Ba1−xCaxTiO3 (x = 0.17) ceramics is discussed in the paper.

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Study of structural, dielectric, ferroelectric and magnetic properties of vanadium doped BCT ceramics

Cited by 28 publications

References 33 publications

Band gap narrowing and electrical properties of (1-x)BaTiO3-xSrFe0.5Nb0.5O3 lead-free ceramics

Band gap narrowing and electrical properties of (1-x)BaTiO3-xSrFe0.5Nb0.5O3 lead-free ceramics

Band Gap Narrowing and Electrical Properties of (1-x)BaTiO3-xSrFe0.5Nb0.5O3 Lead-Free Ceramics

Crossover from Ferroelectric to Relaxor Behavior in Ba1−xCaxTiO3 (x = 0.17) System

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