Effects of Dy on structural, dielectric and magnetic properties of Ni-Sr-Y co-precipitated hexaferrites
| Autor: | Muhammad Azhar Khan, Shakeel Abbas, Mubashar Nadeem, Maria Yousuf Lodhi, Majid Niaz Akhtar |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Process Chemistry and Technology Doping Analytical chemistry chemistry.chemical_element 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Lattice constant chemistry 0103 physical sciences Materials Chemistry Ceramics and Composites Dysprosium Dielectric loss Crystallite Fourier transform infrared spectroscopy 0210 nano-technology Porosity |
| Zdroj: | Ceramics International. 44:22255-22261 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2018.08.347 |
| Popis: | Dysprosium (Dy) doped Y-type strontium hexa ferrites of the following composition Ni2Sr2DyxFe12-xO22 where (x = 0.00, 0.05, 0.10, 0.15, 0.20, 0.25) were prepared through co-precipitation process. Phase analysis of the investigated samples was carried out by characterizing through (XRD) X-ray diffraction which confirmed the pure phase of Y-type hexaferrites. Dysprosium ion doping influenced lattice parameters i.e. lattice constants (a, c), crystallite size, (c/a) ratio, cell volume and porosity. The calculated crystallite size was in the range of 88–159 nm. FTIR plots showed that the characteristics bonds of Ni2Sr2DyxFe12-xO22 are appreciably influenced by the incorporation of Dy contents. The results of dielectric parameters revealed that dielectric constant, dielectric loss, tanloss were decreased with an increase in frequency. At 6.0 × 108 Hz, dielectric constant decreased from 5.55 to 3.69 with increasing Dy concentration. Owing to Maxwell-wagner type relaxation, the decrease in dielectric constant was noticed at higher frequency. The smaller dielectric constants and dielectric losses make these materials suitable for their applications in microwave devices fabrication. |
| Databáze: | OpenAIRE |
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