Journal Article10.1063/1.359597
Dielectric spectroscopy of Ba(B1/2’B1/2‘)O3 complex perovskite ceramics: Correlations between ionic parameters and microwave dielectric properties. I. Infrared reflectivity study (1012–1014 Hz)
Rudolf Zurmühlen,Jan Petzelt,Stanislav Kamba,Valentin V. Voitsekhovskii,Enrico Colla,Nava Setter +5 more
163
TL;DR: In this paper, an attempt has been made to find a correlation between ionic parameters of ceramic materials and their complex permittivity at microwave frequencies, using the Fourier transform infrared reflectivity spectra in the 30-4000 cm−1 range.
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Abstract: An attempt has been undertaken to find a correlation between ionic parameters of ceramic materials and their complex permittivity at microwave frequencies Ten Ba(B1/2’B1/2‘)O3 complex perovskite compounds (B’=Y3+, In3+, Nd3+, Gd3+; B‘=Nb5+, Ta5+ and B’=Mg2+, Cd2+, B‘=W6+) are compared in order to study the effect of ionic radii, mass, and valence state on dielectric properties Fourier transform infrared reflectivity spectra in the 30–4000 cm−1 range were measured and evaluated by means of Kramers–Kronig analysis and classical oscillator fit The data were extrapolated below the measured frequency range to estimate the intrinsic microwave losses The correlations between loss, permittivity, ionic size, mass, and effective charge and polar‐phonon mode parameters were investigated Ionic size was revealed to be the most important parameter, determining the tolerance factor of the structure packing and through this controlling the phonon frequencies and dampings as well as the extrapolated low‐frequency int
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Citations
Dielectric and impedance properties of Sr(Sm0.5Nb0.5)O3 ceramics
TL;DR: In this article, the frequency dependence of the electric modulus peak is found to obey Arrhenius law with activation energy of ∼0.026 eV. And the scaling behavior of the imaginary part of the electrical modulus M″ suggests that the relaxation describes the same mechanism at various temperatures in SSN.
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Impedance and a.c. conductivity studies of Ba(Pr1/2Nb1/2)O3 ceramic
TL;DR: In this article, a correlation between the response of the real system and idealized model circuit composed of discrete electrical components, the model fittings were presented using impedance data and correlated barrier hopping model was employed to successfully explain the mechanism of charge transport in Ba(Pr 1/2Nb1/2)O3.
Investigations of dielectric properties of wolframite A0.5Zr0.5NbO4 ceramics by bond theory and far-infrared spectroscopy
TL;DR: In this paper, the intrinsic dielectric properties of monoclinic A0.5Zr0.4 ceramics with wolframite structure were investigated by chemical bond theory, infrared and terahertz spectroscopy.
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Vibrational properties and infrared dielectric features of Gd2CoMnO6 and Y2CoMnO6 double perovskites
R. X. Silva,R. M. Almeida,Roberto L. Moreira,R. Paniago,Marcos V. dos S. Rezende,Carlos William de Araujo Paschoal +5 more
TL;DR: In this article, the intrinsic dielectric response of double perovskite ceramics with ordered Co2+ and Mn4+ cations was investigated using infrared reflectivity spectroscopy.
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Infrared Spectroscopic Investigations in Ordered Barium Magnesium Niobate Ceramics
TL;DR: In this article, high-ordered Ba(Mg1/3Nb2/3)O3 ceramics from hydrothermal powders were investigated for the first time using infrared spectroscopy.
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