Dielectric and magnetic properties of Nickel ferrite ceramics using crystalline powders derived from DL alanine fuel in sol–gel auto-combustion |
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| Affiliation: | 1. Department of Physics & Astrophysics, University of Delhi, Delhi 110007, India;2. Department of Physics, Amity Institute of Applied Sciences, Amity University, Noida 201301 India;1. Materials Synthesis and Characterization Laboratory, Institute of Advanced Technology (ITMA), Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;2. Advanced Materials Research Center, Materials Engineering Department, Najafabad Branch, Islamic Azad University, Najafabad, Isfahan, Iran;3. Physics Department, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;1. Department of Chemistry, Panjab University, Chandigarh, India-160014;2. Department of Science and Technology, New Delhi;3. ICON Analytical Equipment (P) Ltd., Mumbai - 400018, India;1. Research unit of valorization and optimization of exploitation of resources, Faculty of Science and Technology of Sidi Bouzid, University Campus Agricultural City, University of Kairouan, 9100 Sidi Bouzid, Tunisia;2. Faculty of Sciences of Gafsa, Department of Physics, University Campus - Sidi Ahmed Zarroug, University of Gafsa, 2112 Gafsa, Tunisia;3. Research unit of advanced materials and nanotechnology (URMAN), Higher Institute of Applied Science and Technology of Kasserine, University of Kairouan, PO Box 471, 1200 Kasserine, Tunisia;4. Laboratory of Physics of Materials and Nanomaterials applied to the Environment, Faculty of Sciences of Gabes, Erriadh City, 6079 Gabes, Tunisia;5. College of Engineering-Prince Sattam Bin Abdulaziz University, 655, Al Kharj 11942, Kingdom of Saudi Arabia;1. Departamento de Engenharia Metalúrgica e de Materiais, Centro de Tecnologia, Campus do Pici, Universidade Federal do Ceará – UFC, 60455-760 Fortaleza, CE, Brazil;2. Departamento de Física, Universidade Federal do Ceará – UFC, Campus do Pici, 60440-970 Fortaleza, CE, Brazil;3. Instituto de Física, Universidade de São Paulo – USP, 05315-970 São Paulo, SP, Brazil;1. Department of Physics and Materials Science and Engineering, Jaypee Institute of Information Technology, Noida 201307, India;2. National Physical Laboratory (CSIR), Dr. K.S. Krishnan Marg, New Delhi 110012, India;1. Department of Physics, Govt. First Grade College, Davangere, 577004, India;2. Department of Physics, Govt. First Grade College for Women, Davangere, 577004, India;3. Department of Physics, UBDT College of Engineering, Davangere, 577004, India;4. Department of Physics, Jain Institute of Technology, Davangere, 577004, India |
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| Abstract: | Dielectric and magnetic properties of NiFe2O4 ceramics prepared with powders using DL-alanine fuel in the sol–gel auto combustion technique are studied. DL-alanine fuel yields crystalline as-burnt powders, and when used for ceramic processing yields varying microstructure at different sintering temperatures. The dielectric properties are influenced by the resulting microstructure and the magnetic properties show slight change in saturation magnetization Ms (~44 – 46 emu/g). The coercive fields, dielectric losses and dispersion are reduced considerably at higher sintering temperatures (1200–1300 °C). The influence of changing microstructure is analyzed through dielectric response, complex impedance analysis and electrical modulus spectroscopy in the frequency range (10?2–107 Hz) to understand the interactions from the grain and grain boundary phases. Sintering at 1200 °C, is found to be optimum, yields lower losses & reduced dielectric dispersion, and high resistivity (3.4×108 Ω cm). |
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| Keywords: | A Magnetic materials C Impedance spectroscopy C Raman spectroscopy C X-ray diffraction D Dielectric properties |
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