Magnetic properties of nanocrystalline Ni–Zn, Zn–Mn, and Ni–Mn ferrites synthesized by reverse micelle technique

Gubbala, S.; Nathani, H.; Koizol, K.; Misra, R.D.K.

doi:10.1016/j.physb.2003.12.017

Cited by 184 publications

(99 citation statements)

References 38 publications

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“…The technical importance of ferrites is due to their high electrical resistivity, low dielectric constant, high magnetization, high permeability and low cost. These properties make the ferrites suitable for microwave devices, transformers and electric generator storage devices 1,2 . They are good dielectric materials having low conductivity which is one of the major consideration in many technological applications from microwave to radio wave frequencies 3 .…”

Section: Introductionmentioning

confidence: 99%

Transport Properties of Polycrystalline Mixed Copper-Zinc Ferrites

et al. 2018

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Polycrystalline mixed Cu-Zn spinel ferrites with general formula Cu 1-x Zn x Fe 2 O 4 (x = 0.0, 0.1, 0.3, 0.5 and 0.7) have been prepared by solid-state reaction method. The effect of Zn 2+ ions on transport properties such as DC and AC resistivity, dielectric constant and dielectric loss tangent has been presented in this paper. The resistivity increases with Zn content and decreases with frequency which have been explained by Verway's hopping mechanism. Decrease of DC electrical resistivity with increasing temperature has been observed and activation energy has been found to increase with increasing Zn content. The dielectric constant is found to decrease with increasing Zn content as well as increasing of frequency has been explained on the basis of space charge polarization. In this communication, an attempt has been made to explain the conduction mechanism of Cu-Zn ferrites on the basis of electronic hopping frequency between Fe 2+ and Fe 3+ ions.

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Section: Introductionmentioning

confidence: 99%

Transport Properties of Polycrystalline Mixed Copper-Zinc Ferrites

et al. 2018

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“…Mg occupies octahedral (B) sites and Zn occupies tetrahedral (A) sites in the spinel structure with the formula unit (Zn 2+ Spinel ferrites at nanoscale have been synthesized employing various chemical routes such as sol-gel [4], reverse micelle method [5], ultra sound irradiation [6], hydrothermal method, etc. [7].…”

Section: Introductionmentioning

confidence: 99%

Structural and FTIR Spectroscopic Studies of Mg-Zn Ferrite Nanoparticles Synthesized by Co-Precipitation Technique

2016

IJSR

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“…The magnetization studies displayed a superparamagnetic behavior for the as-prepared and sintered powders at 400°C with the blocking temperature (T B ) below room temperature. Gubbala et al [8] reported the measured magnetic properties of Ni 0.5 Zn 0.5 Fe 2 O 4 prepared by the reverse micelle technique using SQUID at low temperatures (upto 2 K). A nonsaturated M-H loops have been reported at room temperature and also at 2 K even for a field as high as 5T with a nonzero remenence and coercivity at 2 K. The lower value of M S for the nanoparticles of Ni-Zn ferrite compared to the bulk value is attributed to the core-shell morphology of the particles consisting of the ferrimagnetically aligned core spins and spin-glass like surface.…”

Section: Introductionmentioning

confidence: 99%

Effect of Sintering Temperature on the Micro Strain and Magnetic Properties of Ni-Zn Nanoferrites

Venkatesh¹,

Prasad²,

Babu³

et al. 2015

Journal of Magnetics

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In this study, nanocrystalline ferrite powders with the composition Ni 0.5 Zn 0.5 Fe 2 O 4 were prepared by the autocombustion method. The obtained powders were sintered at 800 o C, 900 o C and 1,000 o C for 4 h in air atmosphere. The as-prepared and the sintered powders were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, and magnetization studies. An increase in the crystallite size and a slight decrease in the lattice constant with sintering temperature were observed, whereas microstrain was observed to be negative for all the samples. Two significant absorption bands in the wave number range of the 400 cm −1 to 600 cm −1 have been observed in the FT-IR spectra for all samples which is the distinctive feature of the spinel ferrites. The force constants were found to vary with sintering temperature, suggesting a cation redistribution and modification in the unit cell of the spinel. The M-H loops indicate smaller coercivity, which is the typical nature of the soft ferrites. The observed variation in the saturation magnetization and coercivity with sintering temperature has been attributed to the role of surface, inhomogeneous cation distribution, and increase in the crystallite size.

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Magnetic properties of nanocrystalline Ni–Zn, Zn–Mn, and Ni–Mn ferrites synthesized by reverse micelle technique

Cited by 184 publications

References 38 publications

Transport Properties of Polycrystalline Mixed Copper-Zinc Ferrites

Transport Properties of Polycrystalline Mixed Copper-Zinc Ferrites

Structural and FTIR Spectroscopic Studies of Mg-Zn Ferrite Nanoparticles Synthesized by Co-Precipitation Technique

Effect of Sintering Temperature on the Micro Strain and Magnetic Properties of Ni-Zn Nanoferrites

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