Magnetic and dielectric properties of Ce–Co substituted BiFeO<sub>3</sub>multiferroics

Sharma, Jyoti; Bhat, Bilal Hamid; Kumar, Arun; Godara, Sachin Kumar; Kaur, Talwinder; Want, Basharat; Srivastava, Amar

doi:10.1088/2053-1591/aa6433

Cited by 19 publications

(4 citation statements)

References 44 publications

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“…4.1. Raman analysis X-ray diffraction (XRD) results [15] confirm the formation of the distorted rhombohedral perovskite structure of synthesized Bi 1−x Ce x Fe 1−x Co x O 3 (x = 0.00, 0.01, 0.03, and 0.05) compounds. The atomic substitution at A site and B site of BFO affects the crystal structure and lattice parameters evidently, [15] similar to the results reported by other groups.…”

Section: Resultsmentioning

confidence: 69%

“…Raman analysis X-ray diffraction (XRD) results [15] confirm the formation of the distorted rhombohedral perovskite structure of synthesized Bi 1−x Ce x Fe 1−x Co x O 3 (x = 0.00, 0.01, 0.03, and 0.05) compounds. The atomic substitution at A site and B site of BFO affects the crystal structure and lattice parameters evidently, [15] similar to the results reported by other groups. [16,17] Due to the broadening of the peaks and the low resolution of XRD, details of the changes in the structure of the doped and undoped samples of BFO can be investigated more clearly through Raman spectra.…”

Section: Resultsmentioning

confidence: 69%

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Ce–Co-doped BiFeO ₃ multiferroic for optoelectronic and photovoltaic applications

Sharma¹,

Basandrai²,

Srivastava

2017

Chinese Phys. B

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The Ce-Co-doped BiFeO 3 multiferroic, Bi 1−x Ce x Fe 1−x Co x O 3 (x = 0.00, 0.01, 0.03, and 0.05), has been prepared by a sol-gel auto-combustion method and analyzed through Raman spectroscopy, photoluminescence, and UV-visible spectroscopy. We have observed an anomalous intensity of the second-order Raman mode at ∼ 1260 cm −1 in pure BFO and suppressed intensity in doped samples, which indicates the presence of spin two-phonon coupling in these samples. The photoluminescence spectra show reduction in the intensity of emission with the increasing dopant concentration, which indicates the high charge separation efficiency. A sharp absorption with three charge transfer (C-T) and two d-d transitions are shown by UV-visible spectra in the visible region. The band gap of BiFeO 3 (BFO) is decreasing with increasing dopant concentrations and the materials are suitable for photovoltaic applications.

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Section: Resultsmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 69%

Ce–Co-doped BiFeO ₃ multiferroic for optoelectronic and photovoltaic applications

Sharma¹,

Basandrai²,

Srivastava

2017

Chinese Phys. B

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“…have drawn considerable attention since the last few decades. These nanomaterials find utility in applications such as loudspeaker magnets, transformers, radiofrequency coils, microwave, and electromagnetic shielding devices, memory cells, storage cum recording media, terrestrial and satellite communication, hyperthermia fluids, and water treatment [2][3][4][5][6][7][8][9][10]. Among the various types of hexaferrite (like W, X, M, Y, U, and Z type etc.…”

Section: Introductionmentioning

confidence: 99%

Tailoring the magnetic properties of M-type strontium ferrite with synergistic effect of co-substitution and calcinations temperature

Godara

Kaur

Narang

et al. 2021

Journal of Asian Ceramic Societies

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SrFe 12 O 19 samples were initially prepared using sol-gel auto-combustion method and calcined from 500 to 1100°C (for 6 h). XRD data established the phase formation temperature of SrM phase to be ≈1000°C. Thereafter, the effect of Zn 2+ -Zr 4+ co-dopant on magnetic and structural properties of SrZn x Zr x Fe 12-2x O 19 (x = 0.00-1.00) samples calcined between 900-1100°C was investigated. XRD data shows that the cell volume increases (from 690.45Å 3 (x = 0.00) to 705.72Å 3 (x = 1.00)) while crystallite size decreases (from 123.9 nm (x = 0.00) to 62.3nm (x = 1.00)) calcined at 1000°C. The Rietveld refinement of XRD data confirms a) x = 0.00 sample to be phase pure and b) the presence of ZnFe 2 O 4 (≈2.25) & SrZrO 3 (≈2.93%) impurity phases in x = 1.00 sample, calcined at 1000°C. FESEM micrographs revealed that a) grain size decreases for x > 0.20 with `x' at 900°C and b) increases from 122 nm at 900°C to 443 nm at 1100°C, for x = 0.00. Broadening of Raman bands reveals generation of strain in the lattice with enhancement of Zn 2+ -Zr 4+ concentration. The magnetic studies reveal that the coercivity monotonically decreases (from 5358(x = 0.00) Oe to 690(x = 1.00) Oe at 1000°C) with enhancement of Zn 2+ -Zr 4+ concentration. A maximum M s value ≈ 70.89 emu/g was observed in x = 0.20 sample at 1100°C. M s value also decreases for x > 0.20 at each calcination temperature.

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“…Similar kind of work was reported on other compounds also. [42][43][44][45][46] Moreover, the recent studies on some rare earth (Bsite) based oxide perovskites like BaNpO (T = V, Co, Cr, Mn), 55 XTaO 3 (X = Rb, Fr) 56 MAlO 3 (M = Ce, Pr), 57 XFeO 3 (X = Sr, Ba) 58 and fluoride, calcium perovskites like KZnF 3 , 59 ANCa 3 (A = Sb, Bi) 60 were also investigated for their thermophysical performances. Besides the physical properties, perovskite materials have also been renowned for their applications in spintronics, 61 sensors and electrodes in fuel cells, 62 solar cells, [63][64][65] and in memory devices.…”

Section: Introductionmentioning

confidence: 99%

A first‐principles prediction of thermophysical and thermoelectric performances of SrCeO ₃ perovskite

Kumari

Srivastava

Khenata

et al. 2021

Intl J of Energy Research

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An ever-increasing demand for energy due to increasing usage is driving the scientists to find out materials for their technological applications. In this regard, thermoelectric materials are considered to be excellent candidates as energy sources. Further, for the suitability of materials in device fabrication, the study of various thermophysical parameters is always required. We have therefore tried to explore various performances of SrCeO 3 perovskite, systematically using density functional theory with different potentials. The electronic band structure profile of SrCeO 3 shows semiconducting behaviour in the ground state. Thermoelectric performance indicators like Seebeck coefficient, thermal conductivity, electrical conductivity, and power factor have been estimated within temperature 0 to 700 K. Interestingly, SrCeO 3 displays a figure of merit value 0.27 at 700 K.

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Magnetic and dielectric properties of Ce–Co substituted BiFeO₃multiferroics

Cited by 19 publications

References 44 publications

Ce–Co-doped BiFeO ₃ multiferroic for optoelectronic and photovoltaic applications

Ce–Co-doped BiFeO ₃ multiferroic for optoelectronic and photovoltaic applications

Tailoring the magnetic properties of M-type strontium ferrite with synergistic effect of co-substitution and calcinations temperature

A first‐principles prediction of thermophysical and thermoelectric performances of SrCeO ₃ perovskite

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Magnetic and dielectric properties of Ce–Co substituted BiFeO3multiferroics

Cited by 19 publications

References 44 publications

Ce–Co-doped BiFeO 3 multiferroic for optoelectronic and photovoltaic applications

Ce–Co-doped BiFeO 3 multiferroic for optoelectronic and photovoltaic applications

Tailoring the magnetic properties of M-type strontium ferrite with synergistic effect of co-substitution and calcinations temperature

A first‐principles prediction of thermophysical and thermoelectric performances of SrCeO 3 perovskite

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Magnetic and dielectric properties of Ce–Co substituted BiFeO₃multiferroics

Ce–Co-doped BiFeO ₃ multiferroic for optoelectronic and photovoltaic applications

Ce–Co-doped BiFeO ₃ multiferroic for optoelectronic and photovoltaic applications

A first‐principles prediction of thermophysical and thermoelectric performances of SrCeO ₃ perovskite