| Autor: |
S. P. Pareek, Arun S. Prasad, S. N. Dolia, S. Kumar, M. S. Dhawan, Arvind Samariya, K. Asokan, Jyoti Parashar, V. K. Saxena, K. B. Sharma, P. K. Bajpai, K. S. Ojha, K. N. Singh |
| Rok vydání: |
2011 |
| Předmět: |
|
| Zdroj: |
AIP Conference Proceedings. |
| ISSN: |
0094-243X |
| DOI: |
10.1063/1.3644445 |
| Popis: |
Dielectric behavior of nanosized ZnCrxFe2−xO4 particles with x = 0.2, 0.4, 0.6 and 0.8, synthesized using sol‐gel method have been studied. The XRD patterns confirm formation of single phase cubic spinel structure of the specimens. The dielectric behavior of all the samples has been studied at 300 K as a function of frequency in the range 75 kHz to 10 MHz. Both the real value of dielectric constant (e) and the dielectric loss factor (tanδ) decreases with frequency respectively for all the samples. This decrease in the values could be explained on the basis of available ferrous, i.e. Fe2+, ions on octahedral sites such that beyond a certain frequency of applied electric field the electronic exchange between the ferrous and ferric ions i.e. Fe2+↔Fe3+ cannot follow the applied alternating electric field. Also, a gradual reduction in both e and tanδ observed as Cr concentration increases. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
