Electrical resistivity studies of Cr doped Mg nano-ferrites

Raghasudha, M.; Ravinder, D.; Veerasomaiah, P.

doi:10.1016/j.md.2016.05.001

Cited by 28 publications

(14 citation statements)

References 25 publications

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“…Cobalt ferrite has inverse spinel structure with cobalt in divalent state, occupying the octahedral site, the degree of inversion depending on the methodology of preparation and heat treatment [10,11]. Table 1 synthesized by sol-gel auto ignition method.…”

Section: Introductionmentioning

confidence: 99%

Dielectric properties of nanocrystalline Co-Mg ferrites

Sharma

Parashar

et al. 2015

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Dielectric properties of nanocrystalline Co-Mg ferrites

Sharma

Parashar

et al. 2015

Journal of Alloys and Compounds

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“…8 graph advocates that from 323 -373 K temperature, log of resistivity increases and then start decreasing till to 873 K. In Fig. 8 curves are cracked into two regions knows as ferrimagnetic and paramagnetic [38]. The insertion of Zn-Mg-Co contents in fabricated ferrites boost quantity of divalent iron ions to enhance hopping between Fe iron ions and lead the reduction in DC resistivity.…”

Section: Electrical Propertiesmentioning

confidence: 92%

“…M. R. Anantharaman et al, described that DC resistivity arises due to Fe 2+ ions [41]. Also the resistivity range demonstrated by the samples of the materials are highly applicable for telecommunication (10 8 Ω.cm) and low resistive devices like transformers to control eddy current losses [38][39][40][41][42][43]…”

Section: Electrical Propertiesmentioning

confidence: 99%

Electrical, Dielectric and Magnetic Properties of Mg2+ Doped Zn-Co-La Spinel Ferrites for High Microwave Frequency (5.7-13.4 GHz) Applications

Hassan¹,

Morley²,

Ali³

et al. 2020

Preprint

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In the present research work, Mg 2+ is inserted into Zn 0.4 Co 0.6-x Mg x Fe 1.9 La 0.1 O 4 (X = 0.00, 0.15, 0.30, 0.45, 0.60) soft ferrites prepared by the co-precipitation method. Structural, optical, vibrational, dielectric, electrical and magnetic properties were explored by XRD, SEM, UV, FTIR, SMU two probe, Raman, LCR and VSM methods respectively. XRD pattern revealed the formation of cubic spinel structure in all fabricated nanoferrites by the replacement of Co 2+ ions with Mg 2+ ions. UV-Vis also verified the substitution. The declining nature of optical band gap in the range of 2.65 – 1.85 eV were observed by UV-Vis proving the Mg 2+ ions replacement. Uniform spherical shaped nanoparticles were inspected by SEM investigation in form of microimages confirming the XRD outcomes. DC Electrical resistivity showed remarkable decreasing trend with the enhancement of Mg 2+ concentration from 4.61 x 10 9 to 5.39 x 10 6 Ω-cm as Mg 2+ is more conductive than Co 2+ . Five active phonon modes of Raman were examined by Raman spectroscopy. Dielectric parameters including dielectric losses and impedance demonstrated diminishing trends with the enrichment of Mg 2+ contents. Various magnetic parameters such as magnetic moment (μ B ), anisotropy constant (K), initial permeability (μ i ), Y-K angles (α y-k ) and microwave frequency (ω m ) were disclosed for all nanoferrites. Coercivity (H c ), squareness (SQ), remanance (M r ) and saturation magnetization (M s ) all illustrated significant reducing trends with the addition of Mg 2+ contents. Hence fabricated spinel ferrite materials are highly acceptable in microwave devices and in electrical transformers to remove eddy current losses.

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“…Production of MgCr 2 O 4 built in silicon dioxide matrix of nitrates of corresponding salts with the help of redox reaction with 1.3-propanediol was described in [12]. Electrical resistivity of nanoferrites of MgCr x Fe 2−x O 4 (0≤x≤1) system obtained by gel-citrate method was measured by authors of work [13]. However, no data on studies of magnetic microstructure by Mössbauer spectroscopy were given in papers [8][9][10][11][12][13].…”

Section: Analysis Of the Published Data And Problem Statementmentioning

confidence: 99%