Role of composition and grain size in controlling the structure sensitive magnetic properties of Sm~(3+) substituted nanocrystalline Co-Zn ferrites |
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| Affiliation: | 1. Bahirji Smarak Mahavidyalaya, Basmath, 431512, Maharashtra, India;2. Microwave Research Laboratory, N. E. S. Science College, Nanded, 431601, Maharashtra, India;3. Dnyanopasak Shikshan Mandal''s Arts, Commerce and Science College, Jintur, 431509, Maharashtra, India;4. Guangdong Technion, Israel Institute of Technology, Shantou 515006, China;5. Department of Physics, Shivaji Mahavidyalaya, Udgir-413517, Maharashtra, India;6. School of Physical Sciences, Swami Ramanand Teerth Marathwada University, Nanded, 431606, Maharashtra, India;7. Shri Krishna Mahavidyalaya, Gunjoti, 413613, Maharashtra, India;8. School of Materials Science and Engineering, University of New South Wales, Sydney, 2052, NSW, Australia;1. Engineering Technology Research Center of Magnetic Materials, School of Physics & Materials Science, Anhui University, Hefei 230601, China;2. Institute of Physical Science and Information Technology, Anhui University, Hefei 230601, China;1. Physics Division, Basic Science Department, Ibn Sina National College for Medical Studies, Jeddah, Saudi Arabia;2. Center of Excellence in Genomic Medicine Research, King Abdulaziz University, Jeddah, Saudi Arabia;3. Department of Chemistry, Osmania University, Hyderabad, Telangana State, India;1. Department of Chemistry, Sangameshwar College, Solapur 413001, M.S., India;2. Department of Chemistry, Osmanabad Sub-Centre, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad 413501, M.S., India;3. Department of Chemistry, Shrikrishna Mahavidyalaya, Gunjoti, 413606 Osmanabad, M.S., India;4. Department of Chemistry, Waghire College, Saswad, Pune 412301, M.S., India;1. Department of Physics, Osmania University, Hyderabad 500007, Telangana, India;2. Department of Chemistry, College of Engineering, Osmania University, Hyderabad 50007, Telangana, India;3. Dept. of Physics, GITAM Deemed to be University, Bangalore, Karnataka, India;4. King Abdullah Institute For Nanotechnology, College of Science, Building No. 4, King Saud University, P.O. Box-2455, Riyadh 11451, Saudi Arabia |
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| Abstract: | The nanocrystalline samarium substituted Co-Zn ferrites with chemical formula Co0.7Zn0.3SmyFe2–yO4 (where y = 0, 0.01, 0.02, 0.03, 0.04) were synthesized by sol-gel autocombustion route. The analysis of X-ray diffractograms (XRD) reveals the formation of cubic spinel structure. The planes indexed from XRD analyses were confirmed in the selected area electron diffraction (SAED) image of the sample. Nanocrystalline nature of the particles in the ferrite samples was confirmed by TEM. The morphology was analyzed by scanning electron microscopy (SEM). Magnetic measurements show an increase in the magnetization for x ≤ 0.03. The decrease in magnetization due to spin canting is observed for x = 0.04. The coercivity depends on Sm3+ doping concentration, grain size and saturation magnetization. The complex permeability of the ferrites was analyzed as the function of frequency and Sm3+ composition (y). The real part of complex permeability varies linearly with the grain size. |
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| Keywords: | Nanocrystalline ferrites Rietveld refinement HRTEM Magnetization Coercivity Permeability |
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