Structural, Ferroelectric, and Electrical Properties of NiTiO3 Ceramic

Acharya, Truptimayee; Choudhary, R. N. P.

doi:10.1007/s11664-014-3426-5

Cited by 39 publications

(11 citation statements)

References 42 publications

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“…In other words, the temperatureindependent behavior of tand has been observed irrespective of the frequency up to 200 °C. Nevertheless, the dielectric loss rises exponentially with an increasing temperature beyond 250 °C and a peaks is found at 295 °C, which is attributed to the random dispersion of thermally influenced charged carriers and oxygen vacancies developed during the hightemperature sintering process of the sample [36]. In spite of these defects, decrease of dielectric loss is observed in this sample.…”

Section: Temperature Dependence Of Dielectric Propertymentioning

confidence: 82%

Structural, dielectric, impedance and ferroelectric properties of lead-free Bi(Fe0.85Dy0.15)O3 ceramic

Thansanga

Shukla

Kumar

et al. 2021

J Mater Sci: Mater Electron

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Nowadays, several research groups are extensively trying to develop by synthesizing and characterizing single/co-doped single-phase bismuth ferrite (BFO) in order to get a highly efficient eco-friendly multifunctional devices. In this process, this report is an attempt to provide the detailed studies of structural, dielectric, impedance and ferroelectric properties of Bi(Fe 0.85 Dy 0.15 )O 3 ceramic fabricated via the solid-state reaction method. Analysis of X-ray diffraction (XRD) data confirms a single phase of orthorhombic symmetry. The average crystallite (particle) size is found to be in the order of * 41 nm. The field emission scanning electron microscopy (FE-SEM) spectrum shows a homogeneous grain distribution of the sample. The elemental composition examined by means of energy dispersive X-ray spectroscopy (EDXS) shows the existence of constituent elements of the sample. The electrical measurements and analysis, carried out using a computer-controlled phase sensitive multimeter (PSM) in a frequency range of 1 kHz-1 MHz at different sets of temperature (25-325 °C), provide many interesting features to explain further conduction mechanism. The dielectric analysis exhibits high value of dielectric constant (e r ) and small value of dielectric loss (tand). Due to the effect of electronic and space charge polarization, the e r value falls with an increasing frequency. The frequency-temperature dependence of impedance and electrical modulus analysis reveals the presence of semiconductor nature and non-Debye type of relaxation process in the sample. The analysis of ac-conductivity (r ac ) with respect to frequency and temperature obeys the universal Jonscher's power law. The electric polarization study shows an enhancement in ferroelectric property of the material. Hence, based on the significant enhancement in electrical and ferroelectric properties of the Bi(Fe 0.85 Dy 0.15 )O 3 material, the material may be considered for some applications.

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Section: Temperature Dependence Of Dielectric Propertymentioning

confidence: 82%

Structural, dielectric, impedance and ferroelectric properties of lead-free Bi(Fe0.85Dy0.15)O3 ceramic

Thansanga

Shukla

Kumar

et al. 2021

J Mater Sci: Mater Electron

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“…It may be related to the crystalline size of the materials. NiTiO 3 material synthesized by the citrate gel method had a smaller crystalline size than that of the one synthesized by the solid-state method which leads to an increase in the effective potential barrier height for electrical conduction [12]. The DC conductivity value of NiTiO 3 material was lower compared with those of NiTiO 3 material synthesized by the solidstate method.…”

Section: Conductance Spectral Analysismentioning

confidence: 90%

“…Recently, NiTiO 3 materials have attracted considerable attention because of their high photocatalytic activity under UV irradiation and remarkably under visible light [9 -11]. NiTiO 3 ilmenite materials have been known to show interesting magnetic and electric properties [12]. According to previous studies on NiTiO 3 , these materials have semiconducting and antiferromagnetic properties [13].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, NiTiO 3 has received much attention owing to high solar reflectance in near-infrared radiation, and it has been used as cool pigments for building coatings [15]. NiTiO 3 materials have been synthesized by various methods such as solid-state [12], sol-gel [17], molten salt [14], polymer [18] methods. In this paper, the citrate-gel method was used because it has many advantages such as easy to process and control the structure, extended composition ranges, good homogeneity, and low energy consumption [19].…”

Section: Introductionmentioning

confidence: 99%

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Structural, electrical and ferroelectric properties of NiTiO3 synthesized by citrate-gel method

Viet

Nga

Tho

et al. 2022

Vietnam J. Sci. Technol.

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We carried out the study on NiTiO3 synthesized via citrate-gel method. Structural characteristics were determined by XRD and SEM. The impedance spectra analysis was used to elucidate the dependence of complex impedance values on temperature and frequency. The correlation between DC-conductivity and the inverse temperature values was presented and it complied with semiconductor behavior of Arrhenius type. The real dielectric constant, dielectric loss and AC-conductivity values were reported as a function of frequency ranging from 1 kHz to 10 MHz. Conductivity was found to obey Jonscher’s power law of conductivity. The NiTiO3 samples showed the ferroelectric behavior at room temperature.

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“…lattice polarization was observed, and possibly weak ferromagnetism, indicating the presence of the LiNbO3 structure [11][12][13]. Ferroelectricity and weak ferromagnetism have indeed been observed in bulk samples of NTO as well [14], but the report did not discuss the crystal symmetry of the samples. Thin films of NTO have previously been made by various deposition techniques, including aerosol-assisted CVD [2], sol-gel methods [3,[15][16][17][18], dip-coating [19] and RF-sputtering [4,5], as well as with the previously mentioned pulsed laser deposition [10][11][12].…”

Section: Introductionmentioning

confidence: 92%

Phase and Orientation Control of NiTiO3 Thin Films

2019

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Subtle changes in the atomic arrangement of NiTiO3 in the ilmenite structure affects its symmetry and properties. At high temperatures, the cations are randomly distributed throughout the structure, resulting in the corundum structure with R−3c symmetry. Upon cooling, the cations order in alternating layers along the crystallographic c axis, resulting in the ilmenite structure with R−3 symmetry. Related to this is the R3c symmetry, where the cations alternate both perpendicularly and along the c axis. NiTiO3 with the latter structure is highly interesting as it exhibits ferroelectric properties. The close relationship between structure and properties for ilmenite-related structures emphasizes the importance of being able to control the symmetry during synthesis. We show that the orientation and symmetry of thin films of NiTiO3 formed by atomic layer deposition (ALD) can be controlled by choice of substrate. The disordered phase (R−3c), previously only observed at elevated temperatures, have been deposited at 250 °C on α-Al2O3 substrates, while post-deposition annealing at moderate temperatures (650 °C) induces ordering (R−3). We have in addition explored the symmetry and epitaxial orientation obtained when deposited on substrates of LaAlO3(100), SrTiO3(100) and MgO(100). The presented work demonstrates the possibilities of ALD to form metastable phases through choice of substrates.

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Structural, Ferroelectric, and Electrical Properties of NiTiO3 Ceramic

Cited by 39 publications

References 42 publications

Structural, dielectric, impedance and ferroelectric properties of lead-free Bi(Fe0.85Dy0.15)O3 ceramic

Structural, dielectric, impedance and ferroelectric properties of lead-free Bi(Fe0.85Dy0.15)O3 ceramic

Structural, electrical and ferroelectric properties of NiTiO3 synthesized by citrate-gel method

Phase and Orientation Control of NiTiO3 Thin Films

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