ChemInform Abstract: Overlapping Large Polaron Tunneling Conductivity and Giant Dielectric Constant in Ni0.5Zn0.5Fe1.5Cr0.5O4 Nanoparticles (NPs).
✍ Scribed by Muhammed Tan; Yueksel Koeseoglu; Furkan Alan; Erdogan Sentuerk
- Publisher
- John Wiley and Sons
- Year
- 2011
- Weight
- 21 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0931-7597
No coin nor oath required. For personal study only.
✦ Synopsis
Overlapping Large Polaron Tunneling Conductivity and Giant Dielectric Constant in Ni0.5Zn0.5Fe1.5Cr0.5O4 Nanoparticles (NPs). -The title nanoparticles are hydrothermally prepared from stoichiometric mixtures of NiCl2, Cr2O3, ZnCl2, and FeCl3 in the presence of polyethylene glycol and NaOH (H2O, pH 11.5, 180 °C, autoclave, 24 h). The samples are characterized by powder XRD, FE-SEM, FTIR transmission spectroscopy, and conductivity measurements. The material has a giant dielectric constant approaching 10 6 at around 305 K where it exhibits a dispersive phase transition. The frequency and temperature dependent conductivity of the compound is explained by the overlapping large polaron tunneling model. The dielectric properties of the title nanoparticles are promising for technological low-and high-frequency applications.