Berlin 2005 – wissenschaftliches Programm

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DF: Dielektrische Festkörper

DF 4: Poster

DF 4.22: Poster

Samstag, 5. März 2005, 08:30–16:30, Poster TU C

Broadband dielectric spectroscopy of 0.4PZN-0.3PMN-0.3PSN ceramics — •Juras Banys¹, Jan Macutkevic¹, Algirdas Brilingas¹, Karlis Bormanis², Andris Sternberg², and Vismant Zauls² — ¹Faculty of Physics, Vilnius University, Lithuania — ²Institute of Solid state Physics, University of Latvia, Latvia

Dielectric properties of 0.4PZN/0.3PSN/0.3PMN ceramics in the frequency range 20 Hz to 100 THz and temperature range 20 K to 500 K ranges are reported. At higher temperatures dielectric dispersion occurs in microwave and THz range. At low temperatures anomalous broadening of dielectric dispersion has been observed. Distribution of relaxation times has been calculated directly from dielectric spectra. Over the temperature of the maximum permittivity, the distribution of the relaxation times is symmetrically shaped. At lower temperatures, the distribution of relaxation times becomes asymmetrically shaped. On further cooling the second maximum appears.