Electrical and Dielectric Relaxation Characterization of Ni1−x Zn x Ga0.5Fe1.5O4
| Autor: | S. S. Ata-Allah, M. Kaiser, A. M. Hashhash |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Diffraction
Materials science Infrared Transition temperature Spinel Analytical chemistry chemistry.chemical_element Dielectric Zinc engineering.material Condensed Matter Physics Electronic Optical and Magnetic Materials symbols.namesake Nuclear magnetic resonance Fourier transform chemistry symbols engineering Ferrite (magnet) |
| Zdroj: | Journal of Superconductivity and Novel Magnetism. 28:2193-2201 |
| ISSN: | 1557-1947 1557-1939 |
| Popis: | The ferrite system, Ni1−x Zn x Ga0.5Fe1.5O4 (x ranges from 0.0 to 0.5 in steps of 0.1), has been synthesized by a solid-state reaction technique. Single-phase cubic spinel structure was confirmed with X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) results. The effect of introducing zinc in the unit cell on the electrical properties was investigated in the ranges 102–105 Hz and 300–600 K of frequency and temperature, respectively. Semiconducting behavior over all studied ranges of frequency and temperature was observed. This behavior is attributed to the cation–anion–cation interaction, which is most predominant at B-sites in these samples. Variation of the universal exponents with temperature indicates the presence of a correlated barrier hopping (CBH) mechanism. The determined transition temperature T C was found to decrease with increasing the compositional parameter x. |
| Databáze: | OpenAIRE |
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