| Autor: |
Vytautas Samulionis, J. Banys, Y. U. Vysochanskii, A. Dziaugys |
| Rok vydání: |
2009 |
| Předmět: |
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| Zdroj: |
2009 18th IEEE International Symposium on the Applications of Ferroelectrics. |
| DOI: |
10.1109/isaf.2009.5307601 |
| Popis: |
Investigation results of piezoelectric and dielectric (20 Hz – 1 MHz) properties of layered CuInP 2 S 6 crystals with different compositions and stoichiometry are presented. It was shown that largest phase transition temperature T c ≈ 330K was observed for indium rich CuInP 2 S 6 crystals. In these CuIn 1+δ P 2 S 6 crystals at room temperature electromechanical coupling constant comparable to that of pure CuInP 2 S 6 could be obtained after appropriate poling. Critical dielectric anomalies are found at the phase transitions. It was shown that above phase transition the dielectric properties are strongly influenced by high electrical conductivity. The DC conductivity and conductivity relaxation time exhibits an anomaly close to the phase transition temperature T c =330 K. Its activation energy exhibit only a weak change close to the ferrielectric phase transition temperature in investigated crystals. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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