6533b872fe1ef96bd12d369c

RESEARCH PRODUCT

Dynamics of Polar Clusters in PMN Ceramics: Comparison with PMN Single Crystal

Robertas GrigalaitisVismants ZaulsJuras BanysKarlis BormanisAndris Sternberg

subject

PermittivityMaterials scienceCondensed matter physicsRelaxation (NMR)Dynamics (mechanics)Condensed Matter PhysicsGrain sizeElectronic Optical and Magnetic Materialsvisual_artNano-visual_art.visual_art_mediumPolarCeramicSingle crystal

description

The dielectric permittivity of PMN ceramics was measured in the frequency range from 20 Hz to 37 GHz. From the frequency dependence of the real and imaginary parts of dielectric permittivity, the distribution of relaxation times f(τ) was calculated. The f(τ) function broadens significantly, and the second maximum appears below the 270 K temperature. The dielectric response and also relaxation time distribution of PMN ceramics was compared with the previous results of PMN single crystal. The results showed that dynamics of polar nano regions in PMN ceramics is suppressed due to the small size of grains in the ceramics.

yearjournalcountryeditionlanguage
2006-09-01Ferroelectrics
https://doi.org/10.1080/00150190600889221