Study of structural, dielectric, and impedance properties of lead-free Zr and Y Co-doped BaTiO3

Akter, Sharmin; Ahad, A.; Das, Mithun; Taher, M. A.; Barik, A.; Alam, Fahad; Khan, M. N. I.

doi:10.1016/j.matchemphys.2021.125241

Cited by 14 publications

(8 citation statements)

References 40 publications

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“…Crystallite size may have increased because of the deterioration of crystallite's grain boundaries. As a consequence of the addition of Al concentrations, our current study shows that porosity varies inversely with bulk density, which is similar to the previously published conclusion [61]. Table 1 summarizes the lattice parameter, density, porosity, and crystalline size, of several samples derived using the XRD data.…”

Section: Porositysupporting

confidence: 90%

“…And also listed in table 2. The plots exhibit an anisotropic character [61]. The crystallite sizes estimated by the W-H approaches were discovered to have similar behavier to those obtained using the Scherrer technique.…”

Section: Wiliamson-hall (W-h) Plot Methodssupporting

confidence: 53%

“…Besides, High frequency decreased the rate of domain wall motion, resulting in less loss [47]. The addition of a modest quantity of Al content caused a minor change in the loss factor [61]. The composition with Al content, x=0.10, exhibits the most minor loss.…”

Section: Permeability Measurementsmentioning

confidence: 99%

“…The intergranular porosity is significantly affected by grain size [60]. The porosity in the prepared samples, which may be generated and developed during sintering, exhibited an inverse pattern with bulk density (B), as the presence of pores in these samples may cause variation in bonding among the components of the compositions, resulting in a shift in the interatomic distance, which in turn increased the volume of the unit cell and lowered density [61,62]. 94% and a minimum density of 6.768 g cm −3 .…”

Section: Porositymentioning

confidence: 99%

“…The ò′ reflects the material's ability to accumulate charge compared to a vacuum by polarizing the medium in an applied electric field [61]. It may be thought of as the magnitude of the dynamical screening impact caused by a system's charge excitations at a certain frequency.…”

Section: Frequency-dependent Dielectric Constant Measurementmentioning

confidence: 99%

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Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba_0.6Sr_0.4Ti_1-xAl_xO₃ ceramics via Sr and Al Co-doping engineering

Mahmud

Ahamed

Khan

2022

Mater. Res. Express

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In this research, structural, magnetic, electrical, and optical properties of Al3+ substituted Ba0.6Sr0.4Ti1-xAlxO3 ceramics (where x = 0.00 to 0.20) have been investigated and discussed. The ceramic samples have been successfully synthesized by the conventional solid-state reaction method. The crystallinity of the prepared samples has been confirmed by X-ray peak broadening techniques such as the Williamson Hall (W-H) plot technique and the Scherrer method. The lattice constant "a", showing a significant drop as Al concentration increases, varies from 3.9420A to 3.9210A. The FTIR spectrum revealed a prominent peak between 435 cm−1 to 540 cm−1, without showing any secondary phase. Raman spectroscopic analysis showed that the prepared samples are in cubic phase with no phase transition. The shifting of a dominating peak in Raman at 580 cm-1 is due to the development of AlTi defects. VSM analysis at room temperature showed the ferromagnetic characteristics of all the samples. The highest value of the anisotropic constant (Ka~39.933 emu/cm3) has been seen at x=0.10. The real component of initial permeability is almost constant for the frequency range of about 75 MHz, and above this frequency range, it quickly reduces. At the high-frequency range, the prepared samples show an excellent relative quality factor due to the low dielectric loss, notably when x = 0.05. The prepared perovskites exhibited minimum eddy current loss characteristics due to the increment of AC resistivity at x=0.20. UV–visible spectroscopy shows a significant change in the energy bandgap from 3.23 eV to 3.04 eV with the doping concentrations.

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Section: Porositysupporting

confidence: 90%

Section: Wiliamson-hall (W-h) Plot Methodssupporting

confidence: 53%

Section: Permeability Measurementsmentioning

confidence: 99%

Section: Porositymentioning

confidence: 99%

Section: Frequency-dependent Dielectric Constant Measurementmentioning

confidence: 99%

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Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba_0.6Sr_0.4Ti_1-xAl_xO₃ ceramics via Sr and Al Co-doping engineering

Mahmud

Ahamed

Khan

2022

Mater. Res. Express

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Perovskite materials advance the potent sensor exploration

Ouyang,

Shen,

Feng

et al. 2024

J Chinese Chemical Soc

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Perovskite materials with unique crystal structure have developed rapidly in recent years owing to their special physical and chemical properties, such as high light absorption and extraordinary electrocatalytic properties. Metal halide perovskites are quite attractive in various fields because of their simple manufacturing process, adjustable band gap, good charge transfer performance, and high theoretical photoelectric conversion efficiency. Therefore, perovskite oxides mixed with metal elements become ideal samples for studying the surface and catalytic performance of catalysts. In this review, various metal perovskites are clearly classified and introduced according to the corresponding synthesis methods, including hydrothermal method, sol–gel method, and high‐temperature solid phase, as well as coprecipitation. The excellent properties of perovskite make it extensively used in nanotechnology, chemistry, environmental protection, and material science, especially in solar cells and sensors. In particular, the nanosized perovskite materials are becoming more and more popular in sensors, which was reviewed in detail here. Most importantly, the design of electrochemical sensors using perovskite nanomaterials with low detection limit and high sensitivity will bring new insight into the detection of biomolecules. Both challenges and prospects of metal perovskites were discussed for promoting the development of biosensors in the end.

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Effect of Cobalt Doping on Structural, Morphological, Magnetic, Electrical, and Optical Properties of (Ba_0.7Sr_0.3)_0.98Ca_0.02Ti_1−XCo_xO₃ Ceramics for Device Applications

Mahmud

Ahamed

Khan

2023

Physica Status Solidi (a)

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Considering the multifunctional performance, the (Ba0.7Sr0.3)0.98Ca0.02Ti1−xCoxO3 (x = 0.00–0.2) ceramics are successfully synthesized using the traditional solid‐phase reaction method. The effect of cobalt doping on the samples’ structural, morphological, magnetic, electrical, and optical characteristics is elucidated. Raman spectroscopy and X‐ray diffraction data confirm the dopants’ integration into the cubic perovskite microstructure. At room temperature, the magnetization–magnetic field intensity hysteresis loops from vibrating sample magnetometer reveal the samples’ ferromagnetic character, with a maximum magnetization of 0.091 emu g−1 achieved for x = 15%. The real part of the initial permeability demonstrates that the replacement of Co2+ causes a shift in resonance toward higher frequencies above 85 MHz, indicating the potential of the synthesized ceramics for high‐frequency magnetic applications. The variation in dielectric characteristics from 100 Hz to 10 MHz is explained using electron hopping on octahedral sites and Maxwell–Wagner's model. The increase of AC conductivity in the high‐frequency region is consistent with the strengthening of the grain effect on the conduction mechanism, which supports the small‐range polaron‐hopping theory. The complex electric modulus's peak (M′′) shifts toward a higher‐frequency region with cobalt content, suggesting a reduction in the relaxation rate. The optical bandgap is observed to decrease from 3.08 to 2.96 eV with cobalt content.

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Study of structural, dielectric, and impedance properties of lead-free Zr and Y Co-doped BaTiO3

Cited by 14 publications

References 40 publications

Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba_0.6Sr_0.4Ti_1-xAl_xO₃ ceramics via Sr and Al Co-doping engineering

Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba_0.6Sr_0.4Ti_1-xAl_xO₃ ceramics via Sr and Al Co-doping engineering

Perovskite materials advance the potent sensor exploration

Effect of Cobalt Doping on Structural, Morphological, Magnetic, Electrical, and Optical Properties of (Ba_0.7Sr_0.3)_0.98Ca_0.02Ti_1−XCo_xO₃ Ceramics for Device Applications

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Study of structural, dielectric, and impedance properties of lead-free Zr and Y Co-doped BaTiO3

Cited by 14 publications

References 40 publications

Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba0.6Sr0.4Ti1-xAlxO3 ceramics via Sr and Al Co-doping engineering

Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba0.6Sr0.4Ti1-xAlxO3 ceramics via Sr and Al Co-doping engineering

Perovskite materials advance the potent sensor exploration

Effect of Cobalt Doping on Structural, Morphological, Magnetic, Electrical, and Optical Properties of (Ba0.7Sr0.3)0.98Ca0.02Ti1−XCoxO3 Ceramics for Device Applications

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Product

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Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba_0.6Sr_0.4Ti_1-xAl_xO₃ ceramics via Sr and Al Co-doping engineering

Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba_0.6Sr_0.4Ti_1-xAl_xO₃ ceramics via Sr and Al Co-doping engineering

Effect of Cobalt Doping on Structural, Morphological, Magnetic, Electrical, and Optical Properties of (Ba_0.7Sr_0.3)_0.98Ca_0.02Ti_1−XCo_xO₃ Ceramics for Device Applications