‘Window’ effect in the analysis of frequency dependence of ionic conductivity

Jain, Himanshu; Hsieh, C. H.

doi:10.1016/0022-3093(94)90669-6

Cited by 123 publications

(41 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This may be due to the release of space charges with rise in temperature [22,23]. It can be attributed to the reduction in barrier properties of the materials with rise in temperature and responsible for the enhancement of conductivity [24,25]. At a particular frequency, Z  becomes independent of frequency.…”

Section: Impedance Propertiesmentioning

confidence: 99%

Structural, dielectric, and electrical properties of lithium niobate microfibers

Cena

Behera

2016

J Adv Ceram

View full text Add to dashboard Cite

Lithium niobate (LiNbO 3 ) fibers, obtained from the heat treatment of composite fibers (polymer/inorganic precursors), were successfully prepared by using the blow-spinning technique. A chemical solution containing Li and Nb ions, added to poly(vinyl pyrrolidone) solution, was used as precursor solution. The best condition for producing composite fibers was determined. The morphology of green and crystallized fibers was characterized by scanning electron microscopy (SEM) and revealed fibrous structure with an average diameter around 800 nm. X-ray diffraction (XRD) measurement revealed a pure LiNbO 3 (LN) phase formation. Detailed studies of dielectric response at various frequencies and temperatures exhibited a dielectric anomaly at 364 ℃. The electrical properties (impedance, modulus, and conductivity) of the fibers were studied using impedance spectroscopy technique. The contributions of grain and grain boundary effects were observed in the LN fibers. The activation energy of the composite fibers was found to be 1.5 eV in the high temperature region (325-400 ℃).

show abstract

Section: Impedance Propertiesmentioning

confidence: 99%

Structural, dielectric, and electrical properties of lithium niobate microfibers

Cena

Behera

2016

J Adv Ceram

View full text Add to dashboard Cite

show abstract

“…The space charge polarization occurs maximum at higher frequency side for x=0.20 concentration as compared to all other concentration. This may be due to the reduction in barrier properties of the materials with rise in temperature which is responsible for the enhancement of conductivity of the materials [30,31]. At a particular frequency, Z becomes independent of frequency.…”

Section: Impedance Propertiesmentioning

confidence: 99%

Investigation of complex impedance and modulus properties of Nd doped 0.5BiFeO3-0.5PbTiO3 multiferroic Composites

et al. 2014

View full text Add to dashboard Cite

show abstract

“…This nature may be due to the release of space charge [56]. The reduction in barrier properties of the materials with rise in temperature may be a responsible factor for enhancement of a.c. conductivity of the materials at higher frequencies [53,54]. Further, in the low frequency region, there is a decrease in magnitude of ' Z with rise in temperature showing negative temperature coefficient of resistance (NTCR) behavior.…”

Section: Impedance Spectrum Analysismentioning

confidence: 98%

“…As temperature increases, the arc progressively becomes semicircular with a shift of the centre towards origin of the complex plane plot. With further increase in temperature, the slope of the line decreases, and bend towards ' Z -axis (above 300˚C), and thus a semicircle could be traced indicating the increase in conductivity of the sample [53,54]. The presence of semicircular arcs for temperatures upto 450˚C suggests that the electrical processes in the material arise basically due to the contribution from bulk material (grain interior), and can be modeled as an equivalent electrical circuit comprising of a parallel combination of bulk resistance (R b ) and bulk capacitance (C b ) [55].…”

Section: P R Das Et Almentioning

confidence: 99%

“…Impedance data of materials (i.e., capacitive and resistive components), represented in the Nyquist plot, lead to a succession of semicircle. The electrical properties are often presented in terms of impedance (Z) [46][47][48][49][50], permittivity (  ) [49] and electrical modulus (M) [53][54][55]. The frequency dependence of dielectric properties of the materials is normally described in terms of complex dielectric constant ( …”

Section: Impedance Spectrum Analysismentioning

confidence: 99%

See 1 more Smart Citation

Study of Structural and Electrical Properties of a New Type of Complex Tungsten Bronze Electroceramics; Li2Pb2Y2W2Ti4V4O30

Das¹,

Pati²,

Sutar³

et al. 2012

JMP

View full text Add to dashboard Cite

A polycrystalline ceramic, a new type of complex tungsten bronze type structure, having a general formula Li 2 Pb 2 Y 2 W 2 Ti 4 V 4 O 30 has been prepared relatively at low temperature using a mixed-oxide technique after optimizing the calcination conditions on the basis of thermal analysis. The material has been characterized by different experimental techniques. The formation of the material under the reported conditions has been confirmed by an X-ray diffraction technique. A preliminary structural analysis of the material showed the formation of single phase compound in an orthorhombic crystal structure at room temperature. Studies of dielectric properties (ε r , tanδ ) of the above compound as a function of temperature at different frequencies exhibit a ferroelectric phase transition of diffuse type. The electrical properties of the material have been studied using ac impedance spectroscopy technique. Detailed studies of impedance and related parameters exhibit that the electrical properties of the material are strongly dependent on temperature, and bear a good correlation with its microstructure. The temperature dependence of electrical relaxation phenomenon in the material has been observed. The bulk resistance, evaluated from complex impedance spectra, is found to decrease with rise in temperature, exhibiting a typical negative temperature co-efficient of resistance (NTCR)-type behavior similar to that of semiconductors. A small contribution of grain boundary effect was also observed. The complex electric modulus analysis indicates the possibility of hopping conduction mechanism in the system with non-exponential type of conductivity relaxation. The ac conductivity spectra exhibit a typical signature of an ionic conducting system, and are found to obey Jonscher's universal power law.

show abstract

‘Window’ effect in the analysis of frequency dependence of ionic conductivity

Cited by 123 publications

References 9 publications

Structural, dielectric, and electrical properties of lithium niobate microfibers

Structural, dielectric, and electrical properties of lithium niobate microfibers

Investigation of complex impedance and modulus properties of Nd doped 0.5BiFeO3-0.5PbTiO3 multiferroic Composites

Study of Structural and Electrical Properties of a New Type of Complex Tungsten Bronze Electroceramics; Li<sub>2</sub>Pb<sub>2</sub>Y<sub>2</sub>W<sub>2</sub>Ti<sub>4</sub>V<sub>4</sub>O<sub>30</sub>

Contact Info

Product

Resources

About

‘Window’ effect in the analysis of frequency dependence of ionic conductivity

Cited by 123 publications

References 9 publications

Structural, dielectric, and electrical properties of lithium niobate microfibers

Structural, dielectric, and electrical properties of lithium niobate microfibers

Investigation of complex impedance and modulus properties of Nd doped 0.5BiFeO3-0.5PbTiO3 multiferroic Composites

Study of Structural and Electrical Properties of a New Type of Complex Tungsten Bronze Electroceramics; Li&lt;sub&gt;2&lt;/sub&gt;Pb&lt;sub&gt;2&lt;/sub&gt;Y&lt;sub&gt;2&lt;/sub&gt;W&lt;sub&gt;2&lt;/sub&gt;Ti&lt;sub&gt;4&lt;/sub&gt;V&lt;sub&gt;4&lt;/sub&gt;O&lt;sub&gt;30&lt;/sub&gt;

Contact Info

Product

Resources

About

Study of Structural and Electrical Properties of a New Type of Complex Tungsten Bronze Electroceramics; Li<sub>2</sub>Pb<sub>2</sub>Y<sub>2</sub>W<sub>2</sub>Ti<sub>4</sub>V<sub>4</sub>O<sub>30</sub>