Permittivity Relaxation Variation for Additive Doping in Cobalt Ferrite at High Frequencies
| Autor: | Subimal Deb, Sarabu Ramana Murthy, Sundar G. Bharadwaj, Suman Kumar Burnwal, S. Ragini |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Permittivity Materials science Doping 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Hydrothermal circulation Electronic Optical and Magnetic Materials Control and Systems Engineering Cobalt ferrite 0103 physical sciences Materials Chemistry Ceramics and Composites Relaxation (physics) Electrical and Electronic Engineering Composite material 0210 nano-technology Microwave |
| Zdroj: | Integrated Ferroelectrics. 201:155-162 |
| ISSN: | 1058-4587 |
| DOI: | 10.1080/10584587.2019.1668699 |
| Popis: | We present a comparative study of the variation in dielectric relaxation for the additives SiO2, TiO2 and ZrO2 in cobalt ferrite. CoFe2O4 was prepared using microwave hydrothermal system and sintered at 900 °C/30 min using microwave sintering method. Real and imaginary parts of permittivity were measured in the frequency range of 1 MHz to 1.8 GHz for these samples. A shift in the dielectric relaxation towards higher frequencies for doped samples is observed as expected in percolating systems. A non-linear least square fit of the electron oscillator model is used to parameterize absorption in the samples. |
| Databáze: | OpenAIRE |
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