Effect of Cu substitution on magnetic and DC electrical resistivity properties of Ni–Zn nanoferrites

Chandramouli, K.; Rao, P. Anantha; Suryanarayana, B.; Raghavendra, Vemuri; Mercy, Shaik Jesus; Parajuli, D.; Taddesse, Paulos; Mulushoa, S. Yonatan; Mammo, Tulu Wegayehu; Murali, N.

doi:10.1007/s10854-021-06127-7

Cited by 18 publications

(4 citation statements)

References 33 publications

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“…The electrical resistance of all samples decreases with increasing temperature, confirming the semiconductor nature but not the semiconducting process. Numerous studies have also discovered that ferrite’s DC electrical resistivity is dependent on such a tendency [ 45 , 46 , 47 ]. The Verwey–de-Boer hopping process is used to describe the ferrite conduction mechanism [ 48 ], in which electrons hop between identical ions but in different valence states.…”

Section: Resultsmentioning

confidence: 99%

Structure, Morphology and Electrical/Magnetic Properties of Ni-Mg Nano-Ferrites from a New Perspective

et al. 2022

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Using the auto combustion flash method, Ni1−x+2Mgx+2Fe2+3O4 (x = 0, 0.2, 0.6, 0.8 and 1) nano-ferrites were synthesized. All samples were thermally treated at 973 K for 3 h. The structural analysis for the synthesized samples was performed using XRD, high-resolution transmission electron microscopy (HRTEM), and FTIR. Scanning electron microscopy (SEM) was undertaken to explore the surface morphology of all the samples. The thermal stability of these samples was investigated using thermogravimetric analysis (TGA). XRD data show the presence of a single spinel phase for all the prepared samples. The intensity of the principal peak of the spinel phase decreases as Mg content increases, showing that Mg delays crystallinity. The Mg content raised the average grain size (D) from 0.084 μm to 0.1365 μm. TGA shows two stages of weight loss variation. The vibrating sample magnetometer (VSM) measurement shows that magnetic parameters, such as initial permeability (μi) and saturation magnetization (Ms), decay with rising Mg content. The permeability and magnetic anisotropy at different frequencies and temperatures were studied to show the samples’ magnetic behavior and determine the Curie temperature (TC), which depends on the internal structure. The electrical resistivity behavior shows the semi-conductivity trend of the samples. Finally, the dielectric constant increases sharply at high temperatures, explained by the increased mobility of charge carriers, and decreases with increasing frequency.

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Section: Resultsmentioning

confidence: 99%

Structure, Morphology and Electrical/Magnetic Properties of Ni-Mg Nano-Ferrites from a New Perspective

et al. 2022

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“…Among various ferrite materials, magnesium ferrite (MgFe2O4) is one such important ferrite material having a spinel structure with inversion mode. In normal spinel ferrite, divalent metal ions and trivalent metal ions occupy tetrahedral and octahedral sites respectively [2]. In inverse spinel ferrites, maximum trivalent ions occupy tetrahedral sites, and the remaining trivalent and divalent ions occupy octahedral sites [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of Copper Doping on the Structural, Electrical, and Magnetic Properties of Mg-Co Ferrites

et al. 2024

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This research paper focuses on the synthesis and characterization of Cu-doped Mg-Co ferrites with varying compositions (Mg0.6-xCo0.4CuxFe2O4, where x = 0.0, 0.1, 0.2, and 0.3) using a solid-state reaction method. This paper also investigates the structural, morphological, magnetic, and electrical characteristics of synthesized Mg0.6-xCo0.4CuxFe2O4, where x = 0.0, 0.1, 0.2, and 0.3. The X-ray diffraction (XRD) technique confirms the ferrites spinel structure in the Fd-3m space group, with average crystallite sizes ranging from 57.29 to 48.57 nm. Fourier Transform Infrared (FTIR) spectroscopy verifies chemical and structural changes, while scanning electron microscopy (SEM) reveals cubic crystal growth with an average grain size of 1 to 1.5 μm. DC electrical resistivity decreases with increasing temperature and Cu2+ substitution, ranging from 1.4 x 106 Ω-cm to 6.7 x 105 Ω-cm. The study suggests a correlation between resistivity and Cu2+ concentration. Magnetic behaviour, studied using a Vibrating Sample Magnetometer (VSM), shows dependence on dopant concentration, with coercivity ranging from 157 Oe to 256 Oe. The results indicate potential applications in magnetic storage devices, antennas, transformers, and high-frequency electronics.

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“…We have prepared cobalt substituted Ni0.95−xZn0.05CoxFe2O4, (where x = 0.01, 0.02, and 0.03) by easy and cheap soft chemical method and carried their impedance analysis along with dielectric dispersion [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. The structural, morphological, and magnetic properties along with their initial permeability and dielectric constant Ni-Co-Zn were studied recently and published [18,32,33].…”

Section: Introductionmentioning

confidence: 99%

Complex impedance analysis of soft chemical synthesized NZCF systems

et al. 2023

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The soft chemical method was adopted to prepare of cobalt-substituted nickel-zinc ferrites (Ni0.95-x Zn0.05COx Fe2O4 for x = 0.01, 0.02 and 0.03). We have recently studied their structural, morphological, and magnetic properties, initial permeability, and dielectric constant. They were found to be with cubic ferromagnetic spinel structure, the morphology of which is suitable for high-density recording media. The impedance has a major role in characterizing the electrical and magnetic properties of the sample, which are dependent on their permeability and dielectric constant. So, this study will verify the values obtained before. Next, the energy stored in a capacitor is directly proportional, and its size is inversely proportional to the dielectric constant. Similarly, the resistance offered by a material to the magnetic field to pass through it is related to permeability. This study will focus on the variation of impedance with Co2+ concentration. The results were derived with the equivalent circuit model. The impedance analysis is also important in the biological field having a name of Bio-Impedance Analysis (BIA), for determining nutritional status, and many more.

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Effect of Cu substitution on magnetic and DC electrical resistivity properties of Ni–Zn nanoferrites

Cited by 18 publications

References 33 publications

Structure, Morphology and Electrical/Magnetic Properties of Ni-Mg Nano-Ferrites from a New Perspective

Structure, Morphology and Electrical/Magnetic Properties of Ni-Mg Nano-Ferrites from a New Perspective

Effect of Copper Doping on the Structural, Electrical, and Magnetic Properties of Mg-Co Ferrites

Complex impedance analysis of soft chemical synthesized NZCF systems

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