Influence of rare-earth La3+ ion doping on microstructural,magnetic and dielectric properties of Mg0.5Ni0.5Fe2-xLaxO4 (0 ≤ x ≤ 0.1) ferrite nanoparticles |
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| Affiliation: | 1. Department of Chemistry, Deenbandhu Chhotu Ram University of Science & Technology, Murthal, Sonepat, 131039, Haryana, India;2. Department of Physics, Deenbandhu Chhotu Ram University of Science & Technology, Murthal, Sonepat, 131039, Haryana, India;1. Department of Chemistry, Faculty of Mathematical and Physical Sciences, M. S. Ramaiah University of Applied Sciences, Bangalore 560058, India;2. Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India;1. School of Physics and Materials Science, Shoolini University, Bajhol, Solan, HP, 171232, India;2. Himalayan Centre of Excellence in Nanotechnology, Shoolini University, Bajhol, Solan, HP, 171232, India;3. Department of Physics, Amity University Haryana, Gurgaon, 122413, India;4. Amity Institute of Nanotechnology, Amity University Haryana, Gurugram, 122413, India;5. Shenzhen Institute of Advanced Sciences, Chinese Academy of Sciences, 518172, China;6. School of Electronics and Information Engineering, Nanjing University of Information Science & Technology, Nanjing, 210044, China;1. Magnetism Laboratory, Department of Physics, Mohanlal Sukhadia University, Udaipur, 313002, India;2. Department of Physics, School of Physical Science, Banasthali Vidyapith, 304022, Rajasthan, India;3. Department of Physics, University of Rajasthan, Jaipur, 302004, India;4. Department of Pure & Applied Physics, University of Kota, Kota, 324005, India;5. Department of Physics, Saurashtra University, Rajkot, 360005, India;1. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, China;2. Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou, 313001, China;3. School of Materials Science and Engineering, Hainan University, Haikou, 570228, China;4. Chengdu Hongke Electronic Technology Co., Ltd, Chengdu, 610100, China;1. Department of Physics, KLE Technological University, Hubballi, India;2. Department of Physics, K.L.E Society''s, P C Jabin Science College, Hubballi-31, India;3. Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia;4. Department of Materials Science and Engineering and Chemical Engineering, Universidad Carlos III de Madrid, Avenida de la Universidad 30, 28911, Leganés, Madrid, Spain;5. Center for Material Science, KLE Technological University, Hubballi-31, Karnataka, India;1. Institute of Physics, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Punjab, Pakistan;2. Centre for Innovative Material Research, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Punjab, Pakistan;3. Department of Physics, College of Science, Princess Nourah bint Abdulrahman University, P.O.Box 84428, Riyadh, 11671, Saudi Arabia;4. Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia;5. Institute of Chemical and Environmental Engineering, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Punjab, Pakistan |
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| Abstract: | A series of La3+ ion doped magnesium nickel ferrites, Mg0.5Ni0.5Fe2-xLaxO4 (0 ≤ x ≤ 0.1) having a cubic spinel structure were prepared by the co-precipitation method. Various characterization techniques, including X-ray diffractometer (XRD), high resolution transmission electron microscopy (HR-TEM), electron spin resonance (ESR) and vibrating sample magnetometer (VSM) were used to investigate structural and magnetic properties. The average crystallite size decreases and lattice parameter increases with La3+ ion doping and lie in the range of 12–7 nm and 8.347–8.361 Å respectively. Analysis of ESR spectra reveals that, g-value with La3+ ion addition decreases from 2.57 to 2.12. The saturation magnetization and the coercivity decrease with increasing rare-earth content. Magnetic-hysteresis (M − H) loop shifts from a ferromagnetic to a superparamagnetic nature with La3+ ion addition. The dielectric study was carried out in the frequency range of 1 KHz to 4000 KHz and temperature ranging 30 °C–350 °C using the impedance analyzer. The dielectric constant decreases with increasing frequency and the La3+ ion concentration. The dielectric loss of the sample increases with increasing temperature. The magnetic properties of the synthesized nanoparticles make them a potential material for stable ferrofluid application and the low tangent loss value makes these material a potential candidate for frequency-based applications. |
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| Keywords: | Spinel Magnesium nickel ferrite Magnetic properties Dielectric Superparamagnetism |
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