Role of Nature of Rare Earth Ion Dopants on Structural, Spectral, and Magnetic Properties in Spinel Ferrites
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ORIGINAL PAPER
Role of Nature of Rare Earth Ion Dopants on Structural, Spectral, and Magnetic Properties in Spinel Ferrites Salma Ikram 1 & Fouzia Ashraf 2 & Meshal Alzaid 3 & K. Mahmood 1 & N. Amin 1 & S. Ali Haider 4 Received: 25 May 2020 / Accepted: 15 October 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In this research work, the effect of ionic radii of various rare earth ions on structural and magnetic properties of spinel ferrites having the composition MFe2-yREyO4 (y = 0, 0.2) (where M = Cu, Cd, Ni, Zn, Mn, and RE = La, Ce, and Tb and Dy) have been studied. XRD reflections for Tb3+/Dy3+ and Ce3+ substitution ensured phase purity of FCC structure formation with no additional impurities. But we have observed secondary phases for lanthanum substituted spinel ferrites due to its larger ionic radii as compared to host crystal. Crystallite sizes and lattice parameters are found to show decreasing trend with decreasing ionic radii of dopant rare earth ions. The magnetic parameters for all prepared samples were discussed by tracing hysteresis curves measured at room temperature. VSM data demonstrated that magnetization of investigated samples was found to be increased with substitution of larger ionic radii ions which is attributed to spin-canting effect and increase of crystallite. Furthermore, the dopants having smaller ionic radii have possessed high coercivity and improved initial permeability. On the basis of these characteristics, these synthesized materials could be suggested for various industrial and technological applications. Keywords Ferrites . XRD . FTIR . VSM
1 Introduction Nanocrystalline spinel ferrites have many mechanically important applications, including attractive account holders and attractive liquids to recover capacity and data, and enhance attractive resonance imaging, catalysis, attractive drug delivery, sensors, and nuances [1]. In a large variety of electronic circuits such as impedance matching networks, filters, lownoise amplifiers, and voltage-controlled oscillators, ferrites are mainly used as inductive constituents. The multilayer chip inductor is one of the most advanced applications of ferrites. For various technological applications like manufacturing of * K. Mahmood [email protected] 1
Department of Physics, Government College University Faisalabad, Faisalabad, Pakistan
2
Department of Pathology, Allama Iqbal Medical College Lahore, Lahore, Pakistan
3
Physics Department, College of Science, Jouf University, Sakaka, Al-Jouf, Saudi Arabia
4
Computer and Information Sciences, State University of New York at Fredonia, Fredonia, NY, USA
magnetic fluids or magnetic recording devices, the pristine and rare earth metal ion doped spinel ferrites are prioritized and widely used because of their magneto-electric and magneto-optical properties [2]. Cation distribution strongly affects these properties of spinel ferrites. Cation distribution is influenced by doping like substituting one or more ions from spinel lattice with any othe
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