Structural modifications and enhanced ferroelectric nature of NdFeO3–PbTiO3 composites

Somvanshi, Anand; Ahmad, Ateed; Husain, Shahid; Manzoor, Samiya; Qahtan, Aref A. A.; Zarrin, Naima; Fatema, Mehroosh; Khan, Wasi

doi:10.1007/s00339-021-04562-1

Cited by 21 publications

(3 citation statements)

References 66 publications

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“…The ferroelectric polarization of the specimens has been investigated at different electric fields as each sample exhibit distinct hysteresis characteristics due to their differing breakdown fields. Incomplete saturation is discernible in P-E loops, due to the substantial leakage current brought on by the oxygen vacancies in this system [42]. The obtained maximum polarization (P m ), remnant polarization (P r ) and coercive field (E c ) values of GdCr 1−x Mn x O 3 (x = 0 and 0.3) are tabulated in table 4.…”

Section: Ferroelectric Polarizationmentioning

confidence: 89%

Exploration of temperature driven conduction process and ferroelectric properties of Mn doped GdCrO₃

Qahtan,

Somvanshi,

Manzoor

et al. 2023

Phys. Scr.

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This work delivers the research findings of the temperature dependent DC resistivity, AC impedance and ferroelectric polarization of GdCr1-xMnxO3 (x=0 and 0.3). Mixed valence states of Cr (Cr3+ and Cr4+) are explored using x-ray photoelectron spectroscopy analysis. The exponential decay of DC resistivity on escalating the temperature advocates the semiconducting-like nature for the probed samples. The DC resistivity data of these samples fit well to small-polaron hopping and variable range hopping models. The impedance attributes of these samples were scrutinized over a broad spectrum of temperatures at selected frequencies. The values of the real and imaginary parts of impedance unveil substantial reduction on raising the temperature, thereby signifying the increase in conductivity of the samples. Pristine sample displays an electrical relaxation peak at 65°C, which translates towards the lower temperature at higher frequencies. Further, the semicircular behavior of Nyquist plots at higher temperatures indicates the reduction of the charge transfer resistance. The equivalent circuits of Nyquist plots are generated using Z-view software. From these plots, it is perceived that grain boundary resistance upsurges while the grain resistance and capacitance drops on doping. The ferroelectric measurements reveal that the coercive field (Ec) values decrease whereas the values of maximum polarization (Pm), remnant polarization (Pr) and energy storage increase in 30% doped GdCrO3. These observations establish that electrical and ferroelectric properties of GdCrO3 system can be tuned with appropriate Mn doping.

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Section: Ferroelectric Polarizationmentioning

confidence: 89%

Exploration of temperature driven conduction process and ferroelectric properties of Mn doped GdCrO₃

Qahtan,

Somvanshi,

Manzoor

et al. 2023

Phys. Scr.

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“…Additionally, the two different modes one at 322 cm −1 and other one at 700 cm −1 are characterized as the IR active E u transverse optical (TO) mode and A 2u longitudinal optical (LO) mode of SnO 2 , respectively [35]. The intense mode at 95 cm −1 and 650 cm −1 are associated with the 7A g and 1B 1g mode of NdFeO 3 [36]. As per a previous studies carried out by Singh et al [37] and Luu et al [38], the appeared peak at 1290 cm −1, and the low intensity peak at 1002 cm −1 can be assigned to another Raman mode of the antiferromagnetic NdFeO 3 in the composite sample.…”

Section: Raman Spectroscopymentioning

confidence: 99%

A comprehensive study of structural, electrical and ferroelectric properties of NdFeO₃-SnO₂ nanocomposite

Ahmad¹,

Somvanshi²,

Husain³

et al. 2022

Phys. Scr.

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The NdFeO3-SnO2 nanocomposite was successfully prepared using a solid-state reaction route. The dual-phase (orthorhombic and tetragonal) in the NdFeO3-SnO2 composite was confirmed by XRD and then analyzed by Rietveld refinement. In the Raman spectrum, the A1g and B2g modes of SnO2 were observed at 650 cm-1, and 770 cm-1, and 7Ag and 1B1g modes of NdFeO3 were observed at 95 cm-1 and 650 cm-1. The Raman modes fingerprint provide good support for the formation of NdFeO3-SnO2 composite. The optical band gap evaluated by using defused reflectance spectroscopy of the as-prepared composite is found to be 3.60 eV. DC resistivity of the nanocomposite decreased with temperature and the sample exhibited the typical semiconducting behavior. The dielectric constant and dielectric loss decreased with frequency while increased with temperature. AC conductivity of the sample increases with the increase in frequency as well as temperature. P-E plots at different temperatures and electric fields reflected the well-known hysteresis loops and hence establish the ferroelectric nature of the sample. The low leakage current of the sample observed in the I-E plot hints towards the possible use of this material in dielectric devices.

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“…leads to an increase in the contributions of metals to the stoichiometry of nanocomposites. Therefore, in spite of the large number of scientific works and previous studies in this direction, there are still many unresolved questions in this direction related to the study of the effect of structural features and phase composition [13][14][15][16][17][18][19][20] changing as a result of thermal annealing in the Fe 3 O 4 /Nd 2 O 3 -based nanocomposites, the interest in which is due to their great potential for application as photocatalysts, absorbents for water purification and biomedical applications, including hyperthermia [15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

EFFECT OF THERMAL ANNEALING ON PHASE TRANSFORMATIONS AND ORDERING OF THE MAGNETIC TEXTURE OF Fe3O4/Nd2O3 NANOCOMPOSITES

Kozlovskiy

Egizbek

Кадыржанов

2022

ijmph

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The paper presents the results of a study of the effect of thermal annealing on the phase transformations and subsequent ordering of the magnetic texture and superfine magnetic parameters in Fe 3 O 4 /Nd 2 O 3 nanocomposites obtained by chemical deposition and subsequent mechanochemical synthesis. X-ray phase analysis and Mössbauer spectroscopy were used to characterize the properties of the obtained Fe 3 O 4 /Nd 2 O 3 nanocomposites. Thermal annealing was carried out in an oxygen-containing medium in the temperature range of 400°C -1000°C for 5 hours followed by cooling for 24 hours until reaching room temperature. The phase transformation dynamics of Fe 2 O 3 /NdFeO 3 → NdFeO 3 >>Fe 2 O 3 → NdFeO 3 type was established using X-ray phase analysis. According to the data of Mössbauer spectroscopy it was established that the domination of the NdFeO 3 phase in the nanocomposite structure at annealing temperatures above 800°С leads to an ordering of the magnetic texture and an increase in the value of the superfine magnetic field to 502.8 kE, approaching the values characteristic of the Fe 2 O 3 structure (513 kE).

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Structural modifications and enhanced ferroelectric nature of NdFeO3–PbTiO3 composites

Cited by 21 publications

References 66 publications

Exploration of temperature driven conduction process and ferroelectric properties of Mn doped GdCrO₃

Exploration of temperature driven conduction process and ferroelectric properties of Mn doped GdCrO₃

A comprehensive study of structural, electrical and ferroelectric properties of NdFeO₃-SnO₂ nanocomposite

EFFECT OF THERMAL ANNEALING ON PHASE TRANSFORMATIONS AND ORDERING OF THE MAGNETIC TEXTURE OF Fe3O4/Nd2O3 NANOCOMPOSITES

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Structural modifications and enhanced ferroelectric nature of NdFeO3–PbTiO3 composites

Cited by 21 publications

References 66 publications

Exploration of temperature driven conduction process and ferroelectric properties of Mn doped GdCrO3

Exploration of temperature driven conduction process and ferroelectric properties of Mn doped GdCrO3

A comprehensive study of structural, electrical and ferroelectric properties of NdFeO3-SnO2 nanocomposite

EFFECT OF THERMAL ANNEALING ON PHASE TRANSFORMATIONS AND ORDERING OF THE MAGNETIC TEXTURE OF Fe3O4/Nd2O3 NANOCOMPOSITES

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Exploration of temperature driven conduction process and ferroelectric properties of Mn doped GdCrO₃

Exploration of temperature driven conduction process and ferroelectric properties of Mn doped GdCrO₃

A comprehensive study of structural, electrical and ferroelectric properties of NdFeO₃-SnO₂ nanocomposite