Phase transformation and two-mode phonon behavior of (1−x) [Ba Zr0.025Ti0.975O3]–(x) [BiFeO3] solid solutions

Jha, P. C.; Jha, Pardeep K.; Jha, A. K.; Kotnala, R.K.; Dwivedi, R.

doi:10.1016/j.jallcom.2014.02.118

Cited by 22 publications

(8 citation statements)

References 18 publications

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“…Earlier, we reported solid solution formation for the entire range of composition, i.e., (1-x) BiFeO 3 -(x) BaZr 0.025 Ti 0.975 O 3 (0.0 x 1.0). 16 It was observed that there is structural transformation from rhombohederal to tetragonal with increasing x and the results are in accordance with the earlier reports on similar type of solid solutions. 10,13,17 Weak ferromagnetic order (FM) has been reported in these solid solutions instead of the AFM order in pure BFO.…”

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confidence: 91%

Diffuse phase ferroelectric vs. Polomska transition in (1-x) BiFeO3-(x) Ba Zr0.025Ti0.975O3 (0.1 ≤ x ≤ 0.3) solid solutions

Jha

Singh

et al. 2015

Journal of Applied Physics

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Investigations on the solid solutions (1-x) BiFeO3 - (x) Ba Zr0.025Ti0.975O3 (0.1 ≤ x ≤ 0.3) in the temperature range 300–750 K show colossal permittivity behavior and the occurrence of diffuse phase ferroelectric transition along with frequency dependent anomaly which disappears at temperature ∼450 K. For x = 0.3, these anomalies have been verified through differential scanning calorimetry and dielectric/impedance/conductivity measurements. The occurrence of peak in pyrocurrent (dPs/dT) vs. T plots also supports phase transition. With the increasing x, transition temperature decreases and diffusivity increases. This anomaly is absent at high frequencies (>100 kHz) in conductivity plots, indicating Polomska like surface phase transition, which is supported by modulus study.

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confidence: 91%

Diffuse phase ferroelectric vs. Polomska transition in (1-x) BiFeO3-(x) Ba Zr0.025Ti0.975O3 (0.1 ≤ x ≤ 0.3) solid solutions

Jha

Singh

et al. 2015

Journal of Applied Physics

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“…Raman spectroscopy is known to be a powerful nondestructive tool for investigating the onset of ferroelectric order in the polar disordered system and for the study of local structure in crystalline, non-crystalline and quasicrystalline materials that can be used in identifying the atomic and nano-scale structural information of the materials [11]. Raman spectroscopy provides necessary information about the variation in lattice vibrations, which is a collection of different entities that directly control the macroscopic ferroelectricity [12].…”

Section: Raman Spectroscopymentioning

confidence: 99%

Structural, dielectric and ferroelectric studies of Ba1−xSrxTiO3 ceramics prepared by mechanochemical activation technique

Jain

Panwar

Jha

2016

J Mater Sci: Mater Electron

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In the present study, specimens of composition Ba 1-x Sr x TiO 3 (x = 0.0, 0.05, 0.075, 0.10 & 0.15) were synthesized using mechanochemical activation technique and their structural, dielectric and ferroelectric characteristics were investigated for the major applications such as a multi-layered ceramic capacitor (MLCC) and microwave tunable devices. Structural analysis using X-ray diffraction pattern of the systems by Rietveld refinement confirms the formation of tetragonal phase with P4 mm space group. The intensity ratio of bonds and wave number shift in Raman spectra suggests little structural changes with strontium content. Microstructural investigation reveals that there is no appreciable change in grain size with increasing strontium concentration. The results on the variation of dielectric constant with temperature suggest the shifting of Curie temperature to lower temperature side with increasing strontium concentration. Current-voltage characteristics reveal that with increasing strontium content current increases which can be correlated with the observed variation of activation energy of the studied samples, which also decreases with the increasing concentration of strontium.

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“…This is also evident from the tetragonal splitting in (2 0 0) peak gradually seem to be disappearing from x = 0.1 to x = 0.4 ( Fig. 1(b)) [13]. Fig.…”

Section: Xrd Analysismentioning

confidence: 59%

“…At some suitable frequencies of the applied alternating field, resonance in dielectric behavior is often observed [27]. Moreover, it is also observed that the sudden increase in loss is frequency dependent but independent of concentration and temperature which has also been observed in the barium zirconate titanate specimen [13]. Fig.…”

Section: Dielectric Studymentioning

confidence: 74%

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Dielectric behavior of (1−x) Ba Zr0.025Ti0.975O3–(x) BiFeO3 solid solutions

Jha

et al. 2013

Materials Research Bulletin

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Phase transformation and two-mode phonon behavior of (1−x) [Ba Zr0.025Ti0.975O3]–(x) [BiFeO3] solid solutions

Cited by 22 publications

References 18 publications

Diffuse phase ferroelectric vs. Polomska transition in (1-x) BiFeO3-(x) Ba Zr0.025Ti0.975O3 (0.1 ≤ x ≤ 0.3) solid solutions

Diffuse phase ferroelectric vs. Polomska transition in (1-x) BiFeO3-(x) Ba Zr0.025Ti0.975O3 (0.1 ≤ x ≤ 0.3) solid solutions

Structural, dielectric and ferroelectric studies of Ba1−xSrxTiO3 ceramics prepared by mechanochemical activation technique

Dielectric behavior of (1−x) Ba Zr0.025Ti0.975O3–(x) BiFeO3 solid solutions

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