Broadband Dielectric Spectroscopy of PSN-Rich PMN-PSN Ceramics
| Autor: | Robertas Grigalaitis, Juras Banys, Vismants Zauls, A. Brilingas, Karlis Bormanis, Andris Sternberg |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
Condensed matter physics Conductivity Condensed Matter Physics Electronic Optical and Magnetic Materials Nuclear magnetic resonance visual_art Frequency dispersion Nano visual_art.visual_art_medium Relaxation (physics) Polar Ceramic Anomaly (physics) Broadband dielectric spectroscopy |
| Zdroj: | Ferroelectrics. 369:190-197 |
| ISSN: | 1563-5112 0015-0193 |
| DOI: | 10.1080/08838150802378145 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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