6533b836fe1ef96bd12a08b7

RESEARCH PRODUCT

Anomalous Broad Distribution of Relaxation Times in Mixed PMN-PSN Ceramics

Juras BanysRobertas GrigalaitisVismants ZaulsA. StenbergA. BrilingasKarlis Bormanis

subject

PermittivityRange (particle radiation)Materials scienceCondensed matter physicsRelaxation (NMR)Low frequencyCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsNuclear magnetic resonancevisual_artNano-visual_art.visual_art_mediumPolarCeramicCole–Cole equation

description

Dielectric permittivity of 0.8PMN-0.2PSN ceramic was measured in the frequency range from 20 Hz to 3 GHz. The typical ferroelectrics relaxor dielectric dispersion was observed. From the frequency dependence of complex dielectric permittivity, the distribution of relaxation times was calculated. The low frequency limit of the distribution of relaxation times diverges according to the Vogel–Fulcher law with the freezing temperature T f = 226 K which is lower than in PMN ceramics, obtained previously. The comparison of distributions of relaxation times between 0.8PMN-0.2PSN and pure PMN tends to the conclusion about smaller polar nano regions in 0.8PMN-0.2PSN ceramic.

yearjournalcountryeditionlanguage
2007-03-20Ferroelectrics
https://doi.org/10.1080/00150190601186932