6533b837fe1ef96bd12a306f
RESEARCH PRODUCT
Broadband Dielectric Spectroscopy of PSN-Rich PMN-PSN Ceramics
Robertas GrigalaitisJuras BanysVismants ZaulsA. BrilingasKarlis BormanisAndris Sternbergsubject
Materials scienceCondensed matter physicsConductivityCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsNuclear magnetic resonancevisual_artFrequency dispersionNano-visual_art.visual_art_mediumRelaxation (physics)PolarCeramicAnomaly (physics)Broadband dielectric spectroscopydescription
The broadband dielectric permittivity of ordered 0.1PMN-0.9PSN and disordered 0.2PMN-0.8PSN ceramics was investigated. The anomaly of dielectric permittivity is clearly seen in the region of 370 K for 0.1 PMN-0.9 PSN at all frequencies. 0.2 PMN-0.8 PSN shows relaxor behaviour with huge frequency dispersion below 350 K. Calculated distribution of relaxation times shows noticeable influence of polar nano regions to the total dielectric spectrum below 320 K with the longest relaxation times edge diverging according to the Vogel-Fulcher law. In 0.1 PMN-0.9 PSN two a little overlapped peaks present in the distribution of relaxation times, influenced by displacive lead motions at high frequencies and possible conductivity phenomena at low frequencies.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-10-20 | Ferroelectrics |