Effect of Cr and Al substitution cations on the structural and magnetic properties of Ni0.6Zn0.4Fe2−Cr/2Al/2O4 nanoparticles synthesized using the sol–gel auto-combustion method

Ghasemi, Ali; Ekhlasi, Sima; Mousavinia, Mohammad

doi:10.1016/j.jmmm.2013.10.022

Cited by 58 publications

(12 citation statements)

References 53 publications

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“…The XRD patterns of Ni 0.5 Zn 0.5 Al x Fe 2−x O 4 (x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6, 1.8, 2.0) ferrite nanoparticles presented in Figure 1 confirmed that all the calcined samples at 600˚C are in crystalline state with cubic spinel crystal structure [21]. Broadening of the XRD peaks says the nano-crystalline behaviour of ferrite.…”

Section: Resultssupporting

confidence: 61%

Effect of Aluminium Doping on Structural and Magnetic Properties of Ni-Zn Ferrite Nanoparticles

Kumar¹,

Donta²,

Reddy³

2015

WJNSE

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Aluminium doped Ni-Zn ferrite nanoparticles of general formula of Ni0.5Zn0.5AlxFe2−xO4 (x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6, 1.8, 2.0) have been synthesized by sol-gel auto combustion method and characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), Fourier transform spectroscopy (FTIR) and vibrating sample magneto meter (VSM). XRD studies confirm that all compositions show single phase cubic spinel structure. The crystallite size was calculated using the Debye-Scherrer formula and found in the range of 17 -52 nm. The lattice parameter "a" is found to decrease with increasing Al 3+ content. The SEM images clearly show the crystalline structure and EDX patterns confirm the compositional formation of the synthesized compositions. The results of FTIR analysis indicated that the functional groups of Ni-Zn spinel ferrite were formed during the sol-gel synthesis process. The IR spectra showed two main absorption bands, the high frequency band ν1 around 600 cm −1 and the low frequency band ν2 around 400 cm −1 arising from tetrahedral (A) and octahedral (B) interstitial sites in the spinel lattice. As doping is increased the magnetic behavior is found to decrease and the composition x = 2.0 ferrite appears to be exhibiting superparamagnetism as the coercive field and retentivity are found near zero.

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Section: Resultssupporting

confidence: 61%

Effect of Aluminium Doping on Structural and Magnetic Properties of Ni-Zn Ferrite Nanoparticles

Kumar¹,

Donta²,

Reddy³

2015

WJNSE

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“…The bands at 1618 and 1619 cm −1 correspond to the asymmetric stretching vibrations of C=O bond [9]. The peaks at 2924 cm −1 are due to stretching vibrations of C=H bond of the CH 3 functional group [6]. The bands in the range 457-470 and 540-549 cm −1 correspond to the vibration of [10] and all the frequencies data are showed in Table 2.…”

Section: Functional Group Analysismentioning

confidence: 92%

“…This may be interpreted by the stronger binding of Fe 3+ ions at the X-sites than at the Y-sites. The bands between 3563 and 3218 cm −1 could be attributed to the O-H stretching vibration of H 2 O absorbed by the sample [6] and the bands at 1112-1100 cm −1 ascribed for C-H bending mode. The peaks with a wave number of 1101 and 1102 cm −1 , are due to stretching vibration of C-O bond [7,8].…”

Section: Functional Group Analysismentioning

confidence: 96%

Structural, morphological and magnetic characters of PVP coated ZnFe2O4 nanoparticles

Sagayaraj¹,

Aravazhi²,

Praveen³

et al. 2017

J Mater Sci: Mater Electron

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The most stable and magnetic recoverable material XY 2 Z 4 (X = Zn, Y = Fe and Z = O) having spinel ferrite nanoparticles were synthesized by chemical co-precipitation technique using polyvinyl pyrrolidone (PVP) as the surfactant. The synthesized nanoparticles were characterized by using various characterization techniques. The X-ray diffraction (XRD) analyses revealed that, the ZnFe 2 O 4 have normal spinel structure of phase pure polycrystalline in nature. The FT-IR analysis revealed that the two prestigious vibration bands recorded near (540-550 cm −1 ) and (455-470 cm −1 ) show the presence of tetrahedral and octahedral voids in zinc ferrite. The transmission electron microscopy (TEM) photographs showed the synthesized ZnFe 2 O 4 nanoparticles are spherical in shape and has magnetic domain structure. The vibrating sample magnetometer (VSM) spectra indicated that the prepared ZnFe 2 O 4 nanoparticles exhibited super paramagnetic behavior along with high saturation magnetization at room temperature. Such synthesis ZnFe 2 O 4 nanoparticles with sympathetic size and tunable magnetic properties are used for various promising biomedical applications.

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“…[27]. As Chromium concentration increases, the particle size is decreasing and the surface area is increasing.…”

Section: M-h Loop Analysismentioning

confidence: 99%

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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Effect of Cr and Al substitution cations on the structural and magnetic properties of Ni0.6Zn0.4Fe2−Cr/2Al/2O4 nanoparticles synthesized using the sol–gel auto-combustion method

Cited by 58 publications

References 53 publications

Effect of Aluminium Doping on Structural and Magnetic Properties of Ni-Zn Ferrite Nanoparticles

Effect of Aluminium Doping on Structural and Magnetic Properties of Ni-Zn Ferrite Nanoparticles

Structural, morphological and magnetic characters of PVP coated ZnFe2O4 nanoparticles

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

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