Characterization of electrical properties of Pb-modified BaSnO3 using impedance spectroscopy

Kumar, Ashok; Singh, B. B.; Choudhary, R. N. P.; Thakur, Awalendra K.

doi:10.1016/j.matchemphys.2005.09.086

Cited by 143 publications

(46 citation statements)

References 17 publications

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“…This behavior indicates an increase in conduction with temperature and frequency. The lower value of Z  at region III at various SM T indicates a possible release of space charge and a consequent lowering of the energy barrier properties [16][17][18]. At higher frequency, the space charge has less time to relax and the recombination would be faster [19].…”

Section: Complex Impedance Analysismentioning

confidence: 98%

“…The frequency spectrum of Z presents some important features: (i) the appearance of a peak (shown by the line in the plot) at a particular frequency (familiar as relaxation frequency) and gradual decrease in Z to a minimum value with a further rise in frequency and then a tendency to form a second peak; (ii) the decrease in the absolute value of Z with a clear shift of the peak toward higher frequency with the increase of SM T ; (iii) the first peak showing the typical peak broadening and the second peak showing the typical peak symmetry. The peak location gives the relaxation time according to the relation  is the pre-exponential factor; and a E is the activation energy [15,16]. From the Arrhenius fit, the activation energy for the sample has been estimated to be 0.37 eV.…”

Section: Complex Impedance Analysismentioning

confidence: 99%

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Complex impedance and electric modulus studies of magnetic ceramic Ni0.27Cu0.10Zn0.63Fe2O4

2015

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Abstract:The electrical properties of Ni 0.27 Cu 0.10 Zn 0.63 Fe 2 O 4 (NCZF) prepared from auto combustion synthesis of ferrite powders have been studied by impedance and modulus spectroscopy. We studied frequency and temperature dependencies of impedance and electric modulus of NCZF in a wide frequency range (20 Hz-5 MHz) at different measuring temperatures SM T (30-225 ℃). The complex impedance spectra clearly showed both grain and grain boundary effects on the electrical properties. The observed impedance spectra indicated that the magnitude of grain boundary resistance gb R becomes more prominent compared to grain resistance b R at room temperature, and with the increase in SM T , gb R decreases faster than the intrinsic b R . The frequency response of the imaginary part of impedance showed relaxation behavior at every SM T , and the relaxation frequency variation with SM T appeared to be of Arrhenius nature and the activation energy has been estimated to be 0.37 eV. A complex modulus spectrum was used to understand the mechanism of the electrical transport process, which indicated that a non-Debye type of conductivity relaxation characterizes this material.

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Section: Complex Impedance Analysismentioning

confidence: 98%

Section: Complex Impedance Analysismentioning

confidence: 99%

Complex impedance and electric modulus studies of magnetic ceramic Ni0.27Cu0.10Zn0.63Fe2O4

2015

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“…Figure 8(a) shows that the dielectric constant (ε ) decreases continuously at lower frequencies and remains constant at higher frequencies giving rise to a plateau. The monotonous decrease in the value of dielectric constant on increasing frequency may be attributed to a combined contribution due to electronic, ionic, and interfacial polarization at low frequencies [52]. The observed dielectric dispersion at low frequencies can be explained on the basis of the Maxwell-Wagner theory of interfacial polarization [53].…”

Section: Dielectric Analysismentioning

confidence: 99%

Mn3O4 Nanoparticles: Synthesis, Characterization, and Dielectric Properties

Dhaouadi¹,

Ghodbane²,

Hosni

et al. 2012

ISRN Spectroscopy

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Mn 3 O 4 nanoparticles were prepared by a simple chemical route using cetyltetramethylammonium bromide (CTAB) as a template agent. Mn 3 O 4 nanocrystals present an octahedral shape, and their crystallite size varies between 20 and 80 nm. They were characterized by XRD, SEM, DTA/TG, and IR spectroscopy. XRD studies confirm the presence of a highly crystalline Mn 3 O 4 phase. The Rietveld refinement of the X-ray diffraction data confirms that Mn 3 O 4 nanoparticles crystallize in the tetragonal system with space group I41/amd. DTA/TG and XRD measurements demonstrate the phase transition toward a spinel structure between 25 and 700 • C. The electrical conductivity increases between 80 and 300 • C, suggesting a semiconducting behaviour of Mn 3 O 4 . Both dielectric dispersion (ε ) and dielectric loss (ε ) were investigated from 80 and 300 • C in the frequency range of 10 Hz-13 MHz. The dielectric properties showed typical dielectric dispersion based on the Maxwell-Wagner model.

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“…6). Variation in the dielectric constant at lower frequency was attributed to space charge contribution rather than electronic and ionic contribution with the increase in frequency [33]. The ionic and electronic contribution became dominant and the space charge contribution diminished gradually.…”

Section: [Tabela I -Parâmetros Estruturais Das Nanopartículas De Tio mentioning

confidence: 88%

Influence of precursor type on structural, morphological, dielectric and magnetic properties of TiO2 nanoparticles

Singh¹,

Mukherjee

Ghosh

et al. 2017

Cerâmica

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TiO 2 nanoparticles (NPs) were synthesized by sol-gel methods using two different precursors, titanium tetraisopropoxide and potassium titanium oxalate (KTO). The precursors had a profound influence on the structural, morphological, dielectric and magnetic properties of synthesized TiO 2 NPs, as evidenced by the XRD, FE-SEM, TEM, LCR and VSM studies in the synthesized samples. Alkoxide-derived TiO 2 NPs contained mostly mixed phases of anatase and rutile, whereas KTO-derived TiO 2 NPs contained anatase and Magnéli phases (Ti n O 2n-1 ). After heat treatment at 550 °C, the crystallite size of KTO-derived NPs was lower than alkoxide-derived TiO 2 NPs. The synthesized nanoparticles were spherical and agglomerated having anatase and rutile phases with different proportions in the microstructure of the alkoxide sample. Dielectric constant of the KTO-derived NPs was higher than the alkoxide-derived NPs. Diamagnetic behavior of KTO-derived NPs was also higher than the alkoxide-derived TiO 2 NPs. Keywords: TiO 2 nanoparticles, sol-gel, dielectric constant, grain size, anatase. Resumo Nanopartículas (NPs) de TiO 2 foram sintetizadas por métodos de sol-gel usando dois diferentes precursores, tetraisopropóxido de titânio e oxalato de potássio e titânio (KTO). Os precursores tiveram profunda influência nas propriedades estruturais, morfológicas, dielétricas e magnéticas das NPs de TiO 2 sintetizadas, como evidenciado pelos estudos de DRX, FE-MEV, MET, LCR

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Characterization of electrical properties of Pb-modified BaSnO3 using impedance spectroscopy

Cited by 143 publications

References 17 publications

Complex impedance and electric modulus studies of magnetic ceramic Ni0.27Cu0.10Zn0.63Fe2O4

Complex impedance and electric modulus studies of magnetic ceramic Ni0.27Cu0.10Zn0.63Fe2O4

Mn3O4 Nanoparticles: Synthesis, Characterization, and Dielectric Properties

Influence of precursor type on structural, morphological, dielectric and magnetic properties of TiO2 nanoparticles

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