Influence of Zn 2+ doping towards the structural, magnetic, and dielectric properties of NiFe 2 O 4 composite
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Influence of Zn2+ doping towards the structural, magnetic, and dielectric properties of NiFe2O4 composite P. Sivaprakash1 · S. Divya2 · R. Parameshwari3 · C. Saravanan1 · Suresh Sagadevan4 · S. Arumugam1 · S. Esakki Muthu1,5 Received: 30 May 2020 / Accepted: 5 August 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract The present work is aimed to study the changes in characteristics of nickel ferrites followed by the zinc doping and for that, the nanocrystalline Ni–Zn ferrites ( Ni1−xZnxFe2O4: x = 0, x = 0.2 and x = 0.4) were prepared via sol–gel auto combustion method and by annealing at subsequent temperature. The physical characterization studies of the final composite provided that the lattice structure of Zn2+ substituted at Ni sites confirms for the single-phase ferrite with spinel structure got investigated at room temperature (RT) with functional, morphological as well as temperature-dependent magnetic and dielectric properties. The magnetic properties imply that the distribution of cations at the lattice sites suggests that the magnetization is getting increased with a decrease of temperature from RT to lower temperature in a field cooling process and is due to the strong dipolar magnetostatic interactions between the individual magnetic moments, which also affirms that the magnetization decreases with a decrease of Ni concentration. The coercively extracted from isothermal magnetization curves attributed to the single domain nature at RT. Further, the dielectric constant (ε′) and dielectric loss (tan δ) are also examined and found to be strongly dependent on the function of frequency and temperature. The change in ε′ and tan δ demonstrated that the dispersion due to the Maxwell–Wagner interfacial polarization and is in a good agreement with Koop’s theory.
1 Introduction The centrosymmetric magnetic nanophase of nickel ferrite (NiFe2O4) is a well-known material and has been studied extensively due to its peculiar properties of the inverse spinel structure, magnetic nature, and electric properties. This material has been shown various technologically important applications in electronic devices, ferrofluids, catalysis, * S. Arumugam [email protected] * S. Esakki Muthu [email protected]; [email protected] 1
Centre for High Pressure Research, School of Physics, Bharathidasan University, Tiruchirappalli 620024, India
2
Department of Physics, National Institute of Technology, Tiruchirappalli 620015, India
3
Centre for Nanoscience and Nanotechnology, Bharathidasan University, Tiruchirappalli 620024, India
4
Nanotechnology & Catalysis Research Centre, University of Malaya, 50603 Kuala Lumpur, Malaysia
5
Department of Physics, Karpagam Academy of Higher Education, Coimbatore 641021, India
microwave adsorbents, digital tape, and disk recordings, magnetic refrigerators, repulsive suspension of levitated systems, magnetic drug delivery and magnetic fluids [1, 2]. The NiFe2O4 is a characteristic ferromagnetic material at room temperature (RT) whic
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