temperature trends of the permittivity in complex oxides of rare-earth elements with perovskite-type structure

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ID: 201115
2003
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Abstract
Ceramic materials based on complex oxides with both the perovskite structure (Ln2/3Nb2O6) and the structure of tetragonal tungsten bronze (Ba6-xLn8+2x/3Ti18O54) have been investigated over a wide frequency and temperature ranges. The results obtained for certain structures denote the presence of the temperature anomalies of dielectric parameters (ε, tanδ). These anomalies occur over the wide frequency range including submilimeter (SMM) wavelength range, and are related neither with the processing peculiarities nor with the presence of the phase transitions. Temperature behavior of the permittivity has been considered in terms of the polarization mechanism based on the elastic-strain lattice oscillations. It has been assumed that the observed anomalies could be ascribed to a superposition of harmonic and anharmonic contribution to lattice oscillations that determines τε sign and magnitude.
Reference Key
a.g.belous2003condensedtemperature Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;A.G.Belous;O.V.Ovcha;D.O.Mischuk
Journal conference on human factors in computing systems - proceedings
Year 2003
DOI
10.5488/CMP.6.2.251
URL
http://dx.doi.org/10.5488/CMP.6.2.251
Keywords
dielectric loss dielectric permittivity microwave dielectricsphysics

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