Topic
Dielectric loss
About: Dielectric loss is a research topic. Over the lifetime, 20296 publications have been published within this topic receiving 349254 citations.
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TL;DR: In this paper, the dielectric properties, infrared (IR) and Raman spectra of tunable microwave (MW) ceramics were studied systematically as functions of composition and temperature.
106 citations
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TL;DR: In this paper, an analysis of the imaginary part of the dielectric susceptibility has revealed the existence of a broad spectrum of relaxation times in the above temperature range, and the temperature dependence of the most probable frequency of the spectrum was obtained.
Abstract: An investigation was carried out on both the linear and nonlinear parts of the complex dielectric susceptibility in the frequency and temperature ranges 10-3-103 Hz and 100-450 K, respectively. The analysis of the imaginary part of the dielectric susceptibility has revealed the existence of a broad spectrum of relaxation times in the above temperature range. The temperature dependence of the most probable frequency of the spectrum was obtained. For temperatures T
106 citations
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TL;DR: In this article, the field dependence of the dielectric constant and the specific heat can be well described by the transverse Ising Hamiltonian including tunnelling and external field terms.
Abstract: Nominally pure has been studied by dielectric spectroscopy using small (linear regime) as well as large electrical fields (non-linear regime) up to . In addition measurements of the specific heat and its field-dependent contribution have been carried out. The field dependence of the dielectric constant and the specific heat can be well described by the transverse Ising Hamiltonian including tunnelling and external field terms. It gives evidence for the existence of polar clusters at low temperatures which are supposed to be associated with the quantum paraelectric state below in accord with recent free-energy calculations. The low-field third-harmonic susceptibility which measures the polar correlations exhibits anomalies near . At high fields an aligned domain state is induced. These results as well as those on the remanent polarization and the dielectric loss have allowed us to deduce a complex E, T-phase diagram. The assignment of the various phases is discussed in connection with the recent proposal of the appearance of a macroscopic quantum state.
106 citations
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TL;DR: In this paper, the authors review recent progress toward dielectric polymers based on two major approaches, in terms of macromolecular architectures, and various chemistry and compositions are discussed within each approach.
106 citations
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TL;DR: In this paper, the dielectric and ferroelectric properties were investigated along the a(b) axis and c axis, separately, at the Curie temperature of 520 °C.
Abstract: SrBi4Ti4O15 single crystals were grown, and their dielectric and ferroelectric properties were investigated along the a(b) axis and c axis, separately. The dielectric permittivity at 1 MHz was 1900 along the a(b) axis at the Curie temperature of 520 °C. This value was ten times higher than that along the c axis. With respect to the ferroelectricity, the saturated remanent polarization was 29 μC/cm2 and the saturated coercive field was 26 kV/cm along the a(b) axis under an electric field of 59 kV/cm, and ferroelectricity was not observed along the c axis.
106 citations