Impact of Dy on structural,dielectric and magnetic properties of Li-Tb-nanoferrites synthesized by micro-emulsion method |
| |
| Affiliation: | 1. Department of Physics, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan;2. Department of Biochemistry, Bahauddin Zakariya University, Multan 60800, Pakistan;3. Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan;4. Department of Chemistry, University of Sargodha, Sargodha 40100, Pakistan;5. Sustainable Energy Technologies (SET) Center, College of Engineering, King Saud University, PO-BOX 800, Riyadh 11421, Saudi Arabia;6. Mining, Metallurgical and Petroleum Engineering Department, Faculty of Engineering, Al-Azhar University, Nasr City, Cairo 11371, Egypt;1. Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan;2. Department of Physics, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan;3. Institute of Chemical Sciences, Bahauddin Zakaryia University, Multan 6100, Pakistan;4. Quaid-e-Azam Medical College, Bahawalpur 63100, Pakistan;5. Physics Research Division, Institute of Basic Sciences, Department of Energy Science, Sungkyunkwan University, Suwon 440-746, South Korea;6. Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan;1. Department of Physics, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan;2. Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan;3. Deanship of Scientific Research, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia;4. Materials Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia;1. Department of Physics, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan;2. Department of Physics, Government College University, Faisalabad, 38000, Pakistan;3. Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan;1. Department of Physics, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan;2. Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan;3. Department of Chemistry,University of Gujrat, Gujrat 50700, Pakistan;4. Department of Chemistry, The University of Sargodha, Sargodha 40100, Pakistan;1. Department of Physics, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan;2. Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan;3. Department of Basic Sciences and Humanities, Muhammad Nawaz Sharif University of Engineering and Technology (MNSUET), 60000, Multan, Pakistan;1. Department of Physics, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan;2. Department of Basic Sciences and Humanities, Muhammad Nawaz Sharif University of Engineering and Technology (MNSUET), 60000 Multan, Pakistan;3. Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan;4. Chemical Engineering Department College of Engineering King Saud University, Riyadh, Saudi Arabia;5. Physics and Astronomy Department College of Science King Saud University, Riyadh, Saudi Arabia |
| |
| Abstract: | A series of Dy-doped Li–Ni ferrites of the following composition Li0.5Ni0.48Tb0.02DyxFe2−xO4 (0.2≤x≥0) was synthesized by the microemulsion method. The X-ray diffraction (XRD) analysis indicated that Li0.5Ni0.48Tb0.02DyxFe2−xO4nano-crystalline ferrites exhibited the single-phase spinel structure. The lattice parameter was determined by the Nelson-Riley refinement technique and it increased by increasing the Dy contents. The crystallite size was computed from the Debye Scherrer's formula and it was in range from 27 to 40 nm. The thermal decomposition process was studied by the thermogravimetric analysis and the annealing temperature observed was 980 °C. The real and complex parts of dielectric constant decreases very sharply in the lower frequency region, but in the higher frequency region, the real and complex part of dielectric constant show variable values with Dy contents. The dielectric tangent loss (tan δ) decreases exponentially with Dy contents. The magnitude of the ac conductivity decreases in certain frequency region, as the Dy contents are increased. The possible mechanisms contributing to the above behavior are discussed. The results of these nanocrystalline ferrites are very suitable materials for microwave device applications. |
| |
| Keywords: | Nano-sized ferrites TGA XRD Dielectric properties Magnetic properties |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
