Journal ArticleDOI
Dielectric relaxation in perovskite Ba(Zn1/2W1/2)O3
TLDR
In this paper, the real and imaginary parts of the dielectric permittivity with frequency were carried out assuming a distribution of relaxation times as confirmed by Cole-Cole plot as well as the scaling behaviour of the Dielectric loss spectra.Abstract:
The complex perovskite oxide barium–zinc–tungstate, Ba(Zn 1/2 W 1/2 )O 3 (BZW) is synthesized by a solid-state reaction technique. The X-ray diffraction study of the sample at room temperature shows a monoclinic phase. The field dependence of dielectric response and the conductivity of the sample are measured in a frequency range from 100 Hz to 1 MHz and in a temperature range from 143 to 650 K. An analysis of the real and imaginary parts of the dielectric permittivity with frequency was carried out assuming a distribution of relaxation times as confirmed by Cole–Cole plot as well as the scaling behaviour of the dielectric loss spectra. The frequency dependent maxima in the imaginary impedance are found to obey an Arrhenius law with an activation energy ≃ 0.82 eV. The frequency dependent electrical data are also analyzed in the frame work of conductivity and electric modulus formalisms. The scaling behaviour of imaginary electric modulus shows the temperature independent nature of the relaxation mechanism. All these formalisms provided for qualitative similarities in the relaxation time.read more
Citations
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Journal ArticleDOI
Rietveld refinement, microstructure, conductivity and impedance properties of Ba[Zr0.25Ti0.75]O3 ceramic
Tanmaya Badapanda,V. Senthil,S. K. Rout,Laécio S. Cavalcante,Alexandre Zirpoli Simões,T.P. Sinha,Simanchalo Panigrahi,M. M. de Jesus,Elson Longo,José Arana Varela +9 more
TL;DR: In this paper, the Rietveld refinement, microstructure, conductivity and impedance properties of Ba[Zr0.25Ti0.75]O3 ceramic synthesized by solid state reaction were reported.
Journal ArticleDOI
Synthesis and characterization of ZnWO4 ceramic powder
TL;DR: In this paper, a ZnWO4 ceramic powder has been synthesized by a solid-state reaction method and a broad and intense blue emission at 472 nm with an excitation at 297 nm has been measured from it with an XRD, SEM, EDAX and FTIR spectral measurements.
Journal ArticleDOI
Field-Driven Hopping Transport of Oxygen Vacancies in Memristive Oxide Switches with Interface-Mediated Resistive Switching
Nan Du,Niveditha Manjunath,Yuan Li,Stephan Menzel,Eike Linn,Rainer Waser,Rainer Waser,Tiangui You,Danilo Bürger,Ilona Skorupa,Ilona Skorupa,Damian Walczyk,Christian Walczyk,Oliver G. Schmidt,Heidemarie Schmidt,Heidemarie Schmidt +15 more
TL;DR: In this article, the authors use impedance spectroscopy and quasistatic state measurements to reveal the dynamics of resistance changes in such devices, and relate these changes to the redistribution of oxygen vacancies via modeling.
Journal ArticleDOI
Complex impedance spectroscopy studies of (La0.70−xNdx)Sr0.30Mn0.70Cr0.30O3 (x≤0.30) perovskite compounds
Sami Kallel,Ammar Nasri,Nabil Kallel,H. Rahmouni,Octavio Peña,Kamel Khirouni,Mohamed Oumezzine +6 more
TL;DR: In this article, the transport properties of Nd-doped perovskite materials (La 0.7−xNdx)Sr 0.3Mn0.7Cr0.30) were investigated using impedance spectroscopy techniques over a wide range of temperatures and frequencies.
Journal ArticleDOI
Relaxations in Ba2BiSbO6 double complex perovskite ceramics
TL;DR: In this paper, the electric properties of the complex double perovskite Ba2BiSbO6 have been investigated using impedance spectroscopy in the frequency range from 1 Hz up to 1 MHz and in the temperature range from room temperature up to 560 K.
References
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Journal ArticleDOI
Dispersion and Absorption in Dielectrics I. Alternating Current Characteristics
Kenneth S. Cole,Robert H. Cole +1 more
TL;DR: In this paper, the locus of the dielectric constant in the complex plane was defined to be a circular arc with end points on the axis of reals and center below this axis.
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Dielectric relaxation in solids
TL;DR: In this paper, a broad-brush view of dielectric relaxation in solids is presented, making use of the existence of a universality of Dielectric response regardless of a wide diversity of materials and structures with dipolar as well as charge-carrier polarization.
Journal ArticleDOI
Theory of Electric Polarization
Journal ArticleDOI
Impedance and dielectric spectroscopy revisited: Distinguishing localized relaxation from long-range conductivity
TL;DR: In this paper, the advantages of plotting a.c. data in terms of impedance, electric modulus, and dissipation factor simultaneously are illustrated, and the degree to which these assignments may be made is related to the dielectric relaxation ratio ( r = ϵ s ϵ ∞ ) and the differences between the time constants of the different relaxation processes present in the material being examined.
Journal ArticleDOI
Dielectric materials for applications in microwave communications
Robert J. Cava,Robert J. Cava +1 more
TL;DR: In this article, the present state of knowledge of the chemistry, structure, and dielectric properties of these materials, as well as examples of our own work, are described and compared.