Crystallite size effect on voltage tunable giant dielectric permittivity of nanocrystalline CuO
| Autor: | A. R. Kaskhedikar, T. Prakash, B. S. Murty, Paritosh D. Peshwe |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
Analytical chemistry Impedance spectroscopy Dielectric Tunabilities Giant dielectric permittivity Bode plots Dielectric materials Crystallite size effects Potential barrier height Room temperature Dielectric permittivities Condensed matter physics Schottky Schottky diode Giant dielectric constants Nanocrystalline material Electronic Optical and Magnetic Materials Dielectric spectroscopy Nanocrystalline CuO Grain boundaries Wide frequency range Permittivity Grain boundary Dc bias voltage Crystallite Voltage-tunable DC bias Voltage |
| Zdroj: | Electronic Materials Letters. 9:59-62 |
| ISSN: | 2093-6788 1738-8090 |
| DOI: | 10.1007/s13391-012-2091-1 |
| Popis: | The effect of crystallite size and applied DC bias voltage on dielectric permittivity of CuO was studied using impedance spectroscopy. The measurements were performed at room temperature in a wide frequency range of 1 Hz to 1 MHz under applied DC bias voltages from 0 to 3 V in the periodic increment of 0. 2 V. The observed applied DC bias voltage effect on giant dielectric constant (e{open}? = 104) were analyzed with 'grain boundary double Schottky potential barrier height model'. The percentage of tunability (T %) at the frequency 100 Hz is found to be 45. 5% for the case of nanocrystalline CuO in contrast to 0% tunability in bulk CuO. � 2013 The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht. |
| Databáze: | OpenAIRE |
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