Synthesis and characterization of nanocrystalline Ti-substituted Zn ferrite

Hankare, P.P.; Patil, R. S.; Jadhav, A.V.; Pandav, R.S.; Garadkar, K. M.; Sasikala, R.; Tripathi, A. K.

doi:10.1016/j.jallcom.2010.10.173

Cited by 57 publications

(19 citation statements)

References 8 publications

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“…As anticipated, the spotted appearance of the diffraction rings is due to high crystallinity of the obtained nanoparticles. Similar observation has also been reported earlier in the literature [24]. Usually High-resolution TEM (HRTEM) micrograph exhibits crystal lattice, as it is evident for a nanoparticles of incur ferrite sample.…”

Section: Transmission Electron Microscopy (Tem) Analysissupporting

confidence: 90%

An investigation of structural and magnetic properties of Cr–Zn ferrite nanoparticles prepared by a sol–gel process

Lakshmi¹,

Kumar

Thyagarajan

2015

J Nanostruct Chem

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Cr x Zn Fe 2-x O 4 (with x = 0.0, 0.1, 0.2, 0.3, 0.4, and 0.5) spinel ferrite nanoparticles have been synthesized via sol-gel method. The precursor compound was calcined at a temperature of 900°C for 3 h. The aim of this study was to investigate the effect of Cr 3? ion substitution on the structural and magnetic properties of Cr-Zn ferrite. The size, shape, and chemical state of the synthesized powders were structurally characterized by powder XRD, SEM, TEM, HRTEM, SAED, energy-dispersive X-ray analysis (EDAX), and Fourier transform infrared spectroscopy (FTIR) spectral techniques. The XRD pattern of Cr-Zn ferrite provides information about single-phase formation of spinel structure with cubic symmetry. Both crystallite size and lattice parameter decrease with increasing Cr content. Formation of spinel structure is affirmed by using FTIR and FTIR spectra which shows that the bands t1 and t2 are found to shift gradually toward the higher frequency side with substitution of Cr, which have been attributed to the decrease in the lattice constant. SEM and TEM micrographs demonstrated that nanoparticles with narrow size distribution were obtained. The average grain size was found to be in nanometer range and of the order of 43-63 nm obtained using TEM images. Compositional stoichiometry was confirmed by EDAX technique. The magnetic properties of synthesized chromium-substituted Zn ferrite nanoparticles were studied using vibrating sample magnetometer at room temperature under the applied magnetic field of 15 KG. The result indicated that the amount of Cr contents significantly influenced the crystal morphology and structural and magnetic properties of Cr-doped Zn ferrite nanoparticles.

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Section: Transmission Electron Microscopy (Tem) Analysissupporting

confidence: 90%

An investigation of structural and magnetic properties of Cr–Zn ferrite nanoparticles prepared by a sol–gel process

Lakshmi¹,

Kumar

Thyagarajan

2015

J Nanostruct Chem

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“…As anticipated, the spotted appearance of the diffraction rings is due to high crystallinity of the obtained nanoparticles. Similar observation has also been reported earlier in the literature [24]. The reason for making EDAX characterization was to ratify the purity and surety of the chemical composition.…”

Section: Transmission Electron Microscope (Tem) Analysissupporting

confidence: 85%

Structural and Magnetic Properties of Cr-Co Nanoferrite Particles

Lakshmi¹,

Kumar

Thyagarajan

2016

ANP

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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.

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“…The FTIR spectra in Fig. 3 indicate the presence of higher (ν 1 ) (550-600 cm −1 ) and lower frequency (ν 2 ) (380-420 cm −1 ) bands designated to the presence of octahedral and tetrahedral sites of metallic oxide complexes [10][11][12][13]. Since from FTIR spectra, it is confirmed that normal mode of vibration of tetrahedral site is higher than the normal mode of vibration of octahedral site.…”

Section: Structural Spectroscopic and Morphological Studiesmentioning

confidence: 79%

Effect of Mn2+ and Cd2+ on the Physical Properties of Li-Mixed Spinel Nanoferrites

Faraz

Maqsood

2011

J Supercond Nov Magn

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The mixed Li-ferrites with dopants Mn 2+ and Cd 2+ are synthesized by chemical co-precipitation method. Structural and morphology analysis with X-ray diffraction (XRD) and SEM, respectively, confirmed the spinel structure with uniform distribution of the nanoparticles of the size in the range 17-36 nm. The dopant concentration affects the lattice parameter by incorporating Cd 2+ , lattice parameter increases in the range 8.3-8.7 Å. This increase is attributed due to difference in ionic radii of cations. The dc electrical resistivity (ρ dc ) and drift mobility (μ d ) confirmed a semiconducting-like behavior. The increase in dopant concentration decreases the activation energy ( E). A small amount of Cd 2+ causes a sudden increase in saturation magnetization (M s ) and remanence (M r ) values. It is observed that up to x = 0.30 M s increases, while further incorporation of Cd 2+ decreases magnetization. This is due to canted spin and can be explained on the basis of the canted spin model. The decrease in Curie temperature with increase in Cd 2+ is due to interaction between tetrahedral (A) and octahedral (B) lattice sites.

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Synthesis and characterization of nanocrystalline Ti-substituted Zn ferrite

Cited by 57 publications

References 8 publications

An investigation of structural and magnetic properties of Cr–Zn ferrite nanoparticles prepared by a sol–gel process

An investigation of structural and magnetic properties of Cr–Zn ferrite nanoparticles prepared by a sol–gel process

Structural and Magnetic Properties of Cr-Co Nanoferrite Particles

Effect of Mn2+ and Cd2+ on the Physical Properties of Li-Mixed Spinel Nanoferrites

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