Dielectric relaxation in CoFe2−xYxO4 (x = 0.2, 0.4, 0.6) prepared by hydrothermal method
| Autor: | Saif Ul Haque, Kallol Kumar Saikia, G. Murugesan, S. Kalainathan |
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| Rok vydání: | 2017 |
| Předmět: |
musculoskeletal diseases
inorganic chemicals Diffraction Materials science chemistry.chemical_element 02 engineering and technology Dielectric 01 natural sciences Oxygen Hydrothermal circulation Nuclear magnetic resonance Impurity 0103 physical sciences Electrical and Electronic Engineering 010302 applied physics Relaxation (NMR) Doping Yttrium 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials surgical procedures operative chemistry Physical chemistry 0210 nano-technology |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 28:6583-6591 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-017-6348-1 |
| Popis: | Yttrium substituted cobalt ferrite (CoFe2−xYxO4) powders (x = 0.2, 0.4 and 0.6) have been synthesized by hydrothermal method. X-ray diffraction has revealed the single phase formation of the compound with impurity phase formation at higher yttrium doping. Dielectric relaxations were observed due to the presence of oxygen vacancies and Maxwell–Wagner effect. The activation energies calculated from the impedance spectra confirmed that oxygen vacancies were the causes for dielectric relaxation. Doping of yttrium has suppressed the magnetic saturation due to the decrease of Fe3+–Fe3+ interactions. |
| Databáze: | OpenAIRE |
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