Microstructural, thermal, electrical and magnetic analysis of Mg 2+ substituted Cobalt ferrite
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Microstructural, thermal, electrical and magnetic analysis of Mg2+ substituted Cobalt ferrite Shaik Jesus Mercy1 · N. Murali2 · A. Ramakrishna3 · Y. Ramakrishna2 · V. Veeraiah1 · K. Samatha1 Received: 13 April 2018 / Accepted: 1 October 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Magnetic nanoparticles of C o1–xMgxFe2O4 (x = 0, 0.08, 0.16, and 0.24) were prepared using sol–gel technique with autocombustion. Citric acid was used as a chelating agent. The X-ray diffraction (XRD) studies showed that the lattice constant of cobalt ferrite decreases with the rise of magnesium proportion. Field-effect Scanning Electron Microscopy (FESEM) was used for the morphological study of the powdered ferrites. Energy Dispersive Spectroscopy (EDS) gave the compositional analysis of the samples. Two major vibrational frequencies from the Fourier Transform Infrared (FT-IR) Spectroscopy vali g modes as a date the spinel cubic ferrite structure. Raman spectroscopy exposes a doublet-like peak behaviour in A 1g and E result of different ionic radius of ions belonging to Mg/Co and Fe. The magnetic parameters like saturation magnetization, coercivity, and remanent were also thoroughly analysed against the increase in the Mg-density in cobalt ferrite. The DC electrical resistivity is found to increase with Mg concentration. The room temperature, electrical and dielectric properties were investigated in the frequency range between 100 and 5 MHz. The observed results were related to the microstructural characteristic and amount of Mg dopants. Keywords Magnetic nanoparticle · Magnetic parameter · Electrical property · Dielectric property · Microstructure
1 Introduction Cobalt ferrite is of the spinel class material with fascinating magnetic features that are important in high-tech systems. Particular attention should be given at the time of preparation of the ferrites that are applicable in high-density magnetic recording, electronic devices, and medicines [1–3]. cobalt ferrites are thermally stable materials which help to use them in a wide range of temperature. They are used in as a pigment and anode materials in lithium-ion batteries [4, 5]. They have low saturation magnetization [6]. The previous works in the literature on Mg-doped Cobalt ferrite reported the drastic effects on their structural, electrical and magnetic
* N. Murali [email protected] 1
Department of Physics, Andhra University, Visakhapatnam, Andhra Pradesh, India
2
Department of Physics, AUCE (A), Andhra University, Visakhapatnam, Andhra Pradesh, India
3
Department of ECE, Aditya College of Engineering and Technology, Surampalem, Kakinada, India
properties which drag our attention for further study on this composition [7]. Recently, the studies on Cobalt ferrite are focused on exploring novel materials that can control and manipulate the magnetic and electric parameters which will help in the application areas of sensors, information storage, catalysts and spintronic devices [8–10]. Therefore, the challenge is to i
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