Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1608359 | Journal of Alloys and Compounds | 2015 | 7 Pages |
Abstract
Nanocrystalline Cr-doped lithium ferrites have been synthesized at different pH values through sol-gel process. Dielectric properties of the synthesized samples were studied via impedance measurements in the frequency range of 100Â Hz-7Â MHz at room temperature. It was found that the dielectric properties strongly depended on the pH value, and the sample synthesized at pH 3.5 exhibited the highest dielectric constant, on the order of â¼107. In contrast, the sample synthesized at pH 11.5 exhibited the lowest dielectric constant. The occurrence of a peak in the dielectric loss spectra was found to be pH dependent, whereas the AC conductivity increased with frequency and was the highest in the sample synthesized at pH 3.5. The impedance spectroscopy and modulus formulism were also employed to investigate the charge transfer and relaxation dynamic properties. Consequently, dielectric properties of the samples were easily tuned by varying the pH during the synthesis process.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Manish Srivastava, R.K. Mishra, Jay Singh, Neha Srivastava, Nam Hoon Kim, Joong Hee Lee,