Synthesis of chromium substituted nano particles of cobalt zinc ferrites by coprecipitation

Sharma, Ram Kripal; Suwalka, Omprakash; Lakshmi, N.; Venugopalan, K.; Banerjee, A.; Joy, P.A.

doi:10.1016/j.matlet.2005.06.004

Cited by 69 publications

(30 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2c) indicates that the system is under tensile strain. The average crystallite sizes of the prepared ferrite particles were calculated by means of the Debye-Scherrer equation (Sharma et al 2005). The crystallite size was found to decrease with increase in cobalt content as was reported by many researchers (Zhang et al 2009).…”

Section: Structural Characterizationmentioning

confidence: 99%

A study on leakage current and electrical properties of oleic acid-coated cobalt-doped Mn-Zn ferrite nanocrystalline powders

Bhuvaneswari¹,

Sendhilnathan

Tamilarasan

et al. 2017

J Anal Sci Technol

View full text Add to dashboard Cite

Background: Mn-Zn ferrites have drawn a continuously an increasing interest because of their potential applications as multifunctional devices. These materials simultaneously exhibit ferroelectricity and ferromagnetism. The dielectric and leakage current properties of Cobalt substituted Mn-Zn ferrites coated with oleic acid were not reported. Methods: This paper presents the synthesis, electrical, and leakage properties of nanoparticles of cobalt-doped MnZn ferrite [Co x Mn y Zn y Fe 2 O 4 (x = 0.1, 0.5, and 0.9 and y = 0.45, 0.25, and 0.05)] coated with oleic acid and prepared by chemical co-precipitation method. The crystal structure was determined by X-ray diffraction (XRD), the effect of strain on the electronic structure was analyzed using Williamson-Hall plot. Complex impedance spectroscopic analysis was carried out, and the impedance plots show the resistive and reactive parts of the impedance. Frequency dependence on AC conductivity was investigated for all the compositions, and leakage current properties were also studied. Results: The nanoparticles were found to have an average size of 13.62 nm. The average crystallite size (D aveXR ) of the precipitated particles found to decrease from 15.22 to 12.65 nm with increasing cobalt substitution. The presence of two semicircular arcs at the lower and higher frequency regions indicates the grain boundary conduction and grain conduction at room temperature. Leakage current density of the order of 10 -4 A/cm 2 (at field strength of 0.02 kV/cm) was observed for all compositions. Conclusion: The variation of the strain values from negative to positive indicates that the strain changes from compression to tensile. The dielectric permittivity was found to decrease from 10

show abstract

Section: Structural Characterizationmentioning

confidence: 99%

A study on leakage current and electrical properties of oleic acid-coated cobalt-doped Mn-Zn ferrite nanocrystalline powders

Bhuvaneswari¹,

Sendhilnathan

Tamilarasan

et al. 2017

J Anal Sci Technol

View full text Add to dashboard Cite

show abstract

“…ions distributed almost equally between the A and B sites [3]. Cobalt ferrite is a familiar hard magnetic material with high coercivity, moderate magnetization and good magnetostrictive properties among all the ferrite family.…”

Section: +mentioning

confidence: 99%

Structural and Magnetic Properties of Cr-Co Nanoferrite Particles

Lakshmi¹,

Kumar

Thyagarajan

2016

ANP

View full text Add to dashboard Cite

Nano-crystalline Cr x CoFe 2−x O 4 (x = 0, 0.1, 0.2, 0.3, 0.4, 0.5) ferrites were synthesized by sol-gel method. The X-ray diffraction patterns of all the samples provide information about the existence of single phase spinel structure. The SEM and TEM micrographs show the uniform particle distribution and SAED pattern represents the polycrystalline nature of the resultant ferrite nano-particles. High purity of the sample is confirmed by energy dispersive X-ray analysis. The FTIR spectra show two strong absorption bands in the range of 600 -400 cm −1 , which confirm the presence of M-O stretching band in ferrites. The magnetic properties of the synthesized samples were investigated by using vibrating sample magnetometer at room temperature. According to VSM reports the main magnetic parameters like saturation magnetization (M s ), coercivity (H c ) were found to decrease with the substitution of Cr 3+ content. Possible mechanisms which are responsible for the results are scrutinized minutely in this paper.

show abstract

“…Due to the very small sizes (1-100 nm) novel and/or improved magnetic characteristics are observed for the nanosized magnetic particles when compared to that of the coarse-grained bulk counterpart (Sharma et al 2005). Nanocrystalline materials can be synthesized either by consolidating small clusters (bottom-up approach) or breaking down the polycrystalline bulk materials into crystalline units with dimensions of nanometer (top-down approach) Vasoya et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Magnetic phase evolution and particle size estimation study on nanocrystalline Mg–Mn ferrites

Modi

Vasoya²,

Lakhani

et al. 2013

Appl Nanosci

View full text Add to dashboard Cite

The nanocrystalline spinel ferrite compositions of Mg x Mn 1-x Fe 2 O 4 (x = 0.0, 0.2, 0.4 and 0.5) system have been synthesized by the chemical co-precipitation route. The structural and magnetic properties have been studied by means of X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and Mossbauer spectroscopic measurements.57 Fe Mossbauer spectra of three specimens, as prepared, annealed at 200°C and sintered at 1,100°C, of the studied compositions are recorded and analyzed to study the magnetic phase evolution. The Mossbauer spectra of as-prepared samples show a paramagnetic doublet, annealed samples exhibit simultaneous presence of a central paramagnetic doublet superimposed on two broad magnetic sextets while spectra for sintered samples show two well-resolved Zeeman split sextets corresponding to the Fe 3? ions at the tetrahedral sites and the other due to the Fe 3? ions at the octahedral sites of the spinel lattice along with presence of central doublet. The particle size estimated from the probability versus hyperfine magnetic field distribution curve is in agreement with those determine from XRD and TEM analysis, validates the method employed.

show abstract

Synthesis of chromium substituted nano particles of cobalt zinc ferrites by coprecipitation

Cited by 69 publications

References 8 publications

A study on leakage current and electrical properties of oleic acid-coated cobalt-doped Mn-Zn ferrite nanocrystalline powders

A study on leakage current and electrical properties of oleic acid-coated cobalt-doped Mn-Zn ferrite nanocrystalline powders

Structural and Magnetic Properties of Cr-Co Nanoferrite Particles

Magnetic phase evolution and particle size estimation study on nanocrystalline Mg–Mn ferrites

Contact Info

Product

Resources

About