Structural,morphological, magnetic and dielectric characterization of nano-phased antimony doped manganese zinc ferrites |
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| Affiliation: | 1. Department of Physics, Vignana Bharathi Institute of Technology, Aushapur(v) Ghatkesar (M), Hyderabad 501301, Telangana, India;2. Department of Physics, Regency Institute of Technology, Adivipolam Yanam 533464, Pondicherry, India;3. Department of Physics, School of Physical, Chemical and Applied Sciences, Pondicherry University, R.V.Nagar, Kalapet, Pondicherry 605014, India;4. Department of Physics, Andhra University, Visakhapatnam 530003, AndhraPradesh, India;5. Indian Institute of Chemical Technology (CSIR), Tarnaka, Hyderabad 500007, India;6. Department of Physics, University College of Engineering, Jawaharlal Nehru Technological University: Kakinada, Kakinada 533003, India;1. Department of Physics, National Institute of Technology Patna, Patna 800005, India;2. Department of Physics, Bose Institute, Kolkata 700009, India;1. School of Science, Civil Aviation University of China, Tianjin 300300, China;2. School of Science and Key Laboratory for Solid State Microstructure of Jiangxi Province, Jiujiang University, Jiujiang, Jiangxi 332005, China;3. Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Faculty of Science, Tianjin University, Tianjin 300072, China;1. Centre for Nano-materials & Energy Devices, School of Physical Sciences, Swami Ramanand Teerth Marathwada University, Nanded 431606, MS, India;2. Department of Physics, Shivaji Mahavidyalaya, Udgir Dist. Latur, MS, India;3. Department of Chemistry, College of Science, Bld#5, King Saud University, Riyadh, Saudi Arabia;4. G.M.D. Arts, B.W. Comm. And Science College, Sinnar Dist. Nashik, MS, India;5. Department of Physics, BaburaoJi Gholap College, Sangvi, Pune, 411027, India;1. Department of Physics, Osmania University, Hyderabad, Telangana 500007 India;2. Department of Physics, JNTUH College of Engineering Manthani, Peddapally, Telangana 505212, India;3. Hyderabad Institute of Technology and Management, Medchal, Hyderabad, Telangana 501401, India;1. Department of Engineering, Graduate school of Integrated Science and Technology, Shizuoka University, Hamamatsu 432-8011, Japan;2. Nanotechnology Research Centre, SRM University, SRM Nagar, Kattankulathur, Kancheepuram District, Tamil Nadu 603203, India;3. Department of Physics and Nanotechnology, SRM University, SRM Nagar, Kattankulathur, Kancheepuram District, Tamil Nadu 603203, India;4. Department of Pharmacy Practice, SRM University, SRM Nagar, Kattankulathur, Kancheepuram District, Tamil Nadu 603203, India;5. Research Institute of Electronics, Shizuoka University, Hamamatsu 432-8011, Japan |
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| Abstract: | Nano-phased doped Mn–Zn ferrites, viz., Mn0.5−x/2Zn0.5−x/2SbXFe2O4 for x=0 to 0.3 (in steps of 0.05) prepared by hydrothermal method are characterized by X-ray diffraction, Infrared and scanning electron microscopy. XRD and SEM infer the growth of nano-crystalline cubic and hematite (α-Fe2O3) phase structures. IR reveals the ferrite phase abundance and metal ion replacement with dopant. Decreasing trend of lattice constant with dopant reflects the preferential replacement of Fe3+ions by Sb5+ion. Doping is found to cause for the decrease (i.e., 46–14 nm) of grain size. An overall trend of decreasing saturation magnetization is observed with doping. Low magnetization is attributed to the diamagnetic nature of dopant, abundance of hematite (α-Fe2O3) phase, non-stoichiometry and low temperature (800 °C) sintering conditions. Increasing Yafet–Kittel angle reflects surface spin canting to pronounce lower Ms. Lower coercivity is observed for x≤0.1, while a large Hc results for higher concentrations. High ac resistivity (~106 ohm-cm) and low dielectric loss factor (tan δ~10−2–10−3) are witnessed. Resistivity is explained on the base of a transformation in the Metal Cation-to-Oxide anion bond configuration and blockade of conductivity path. Retarded hopping (between adjacent B-sites) of carriers across the grain boundaries is addressed. Relatively higher resistivity and low dielectric loss in Sbdoped Mn–Zn ferrite systems pronounce their utility in high frequency applications. |
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| Keywords: | Hydrothermal method Crystallite size Porosity Saturation magnetization Dielelctric constant Ac conductivity Loss factor Hopping and Cationic distribution |
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