scholarly journals Synthesis and Structural Investigation of Nano-Sized Cadmium Ferrite

2016 ◽  
Vol 2 (1) ◽  
pp. 7-12 ◽  
Author(s):  
Rakesh M. Shedam ◽  
Ashok B. Gadkari ◽  
Shridhar N Mathad ◽  
Mahadev R. Shedam
Keyword(s):  
Infrared Spectroscopy ◽  
Structural Investigation ◽  
Spinel Phase ◽  
Lattice Parameter ◽  
X Ray Diffraction ◽  
Absorption Bands ◽  
X Ray ◽  
Ferrite Sample ◽  
Octahedral Group ◽  
Co Precipitation

This report presents the synthesis of cadmium ferrite (CdFe2O4) by Oxalate co-precipitation and its subsequent characterization by using X-ray diffraction (XRD) and Fourier transform Infrared spectroscopy (FTIR) techniques. XRD results confirm the single cubic spinel phase formation with lattice parameter 8.7561Ao. An infrared spectroscopy study shows the presence of main two absorption bands indicating the presence of tetrahedral and octahedral group complexes, respectively, within the spinel lattice. We also report strain, hopping length (LA and LB) and dislocation density  of ferrite sample.

scholarly journals Facile co-precipitation route for magnesium ferrites nanostructure: Synthesis, influence of pH variation on structural properties

2021 ◽  
Vol 53 (1) ◽  
pp. 67-78
Author(s):  
Devi Gole ◽  
S.B. Kapatkar ◽  
Shridhar Mathad ◽  
Rakesh Chavan
Keyword(s):  
Infrared Spectroscopy ◽  
Single Phase ◽  
X Ray Diffraction ◽  
Absorption Bands ◽  
Ph Variation ◽  
X Ray ◽  
Ferrite Sample ◽  
Octahedral Group ◽  
Co Precipitation ◽  
Influence Of Ph

This report presents the synthesis of magnesium ferrite (MgFe2O4) by coprecipitation method and its subsequent characterization by using X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) techniques. XRD results confirm the formation of single phase cubic spinel structure, having lattice constant from 8.3216 ? to 8.3252 ?. An infrared spectroscopy study confirms the presence of two main absorption bands indicating tetrahedral and octahedral group complexes, within the spinel lattice. We also report hopping length (LA and LB), strain (?) and dislocation density (?D) of ferrite sample.

Investigations on Cu2+-substituted Ni–Zn ferrite nanoparticles

2016 ◽  
Vol 30 (32n33) ◽  
pp. 1650347
Author(s):  
Amarjeet ◽  
Vinod Kumar
Keyword(s):  
Spinel Phase ◽  
Thermo Gravimetric Analysis ◽  
Peak Position ◽  
Precipitation Method ◽  
Gravimetric Analysis ◽  
Frequency Range ◽  
X Ray Diffraction ◽  
Absorption Bands ◽  
X Ray ◽  
Zn Ferrite

[Formula: see text] ([Formula: see text] = 0.1, 0.3 and 0.5) nanoparticles were prepared by chemical co-precipitation method. The developed nanoparticles were characterized for structural properties by powder X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) techniques. Peak position in the X-ray diffraction pattern confirmed the single spinel phase of the developed particles. Infrared (IR) spectroscopy in mid-IR range showed the presence of characteristic absorption bands corresponding to octahedral and tetrahedral bonds in the spinel structure of prepared samples. Thermo-gravimetric analysis (TGA) measurements showed a considerable weight loss in the developed samples above 700[Formula: see text]C. Frequency dependence of the electrical properties of the developed material pellets was studied in the frequency range of 1 kHz–5 MHz. Temperature dependence of the dielectric constant of [Formula: see text] was studied at different temperatures, i.e. at 425, 450 and 475 K, in the frequency range of 1 kHz–5 MHz. It was found that the electrical conductivity decreases with increasing Cu[Formula: see text] ion content while it increases with the increase in temperature.

Investigation of Ti Doping on the Structural, Optical and Magnetic Properties of ZnO Nanoparticles

2021 ◽  
Author(s):  
Raji P ◽  
K Balachandra Kumar
Keyword(s):  
Hexagonal Wurtzite Structure ◽  
Xrd Analysis ◽  
Infrared Analysis ◽  
Near Band Edge ◽  
Band Edge Emission ◽  
X Ray Diffraction ◽  
Absorption Bands ◽  
X Ray ◽  
Co Precipitation ◽  
Ti Doping

Abstract Ti - doped ZnO (TixZn1-xO x= 0.00, 0.05, 0.10, 0.15) nanoparticles have been synthesized through co - precipitation approach. X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL), UV-Visible spectroscopy, and Vibrating Sample Magnetometer (VSM) have been used to characterize the samples. X-Ray Diffraction (XRD) analysis manifested the hexagonal wurtzite structure. The crystallite size decreased from 37 ​nm to 29 ​nm as dopant concentration is increased. Fourier transform infrared analysis showed the absorption bands of ZnO, with few within the intensities. SEM investigation showed the irregular shape and agglomeration of the particles. Ti, Zn, and O composition were determined from EDX analysis and confirmed the purity of the samples.PL spectra showed a near band edge emission and visible emission.Vibrating sample magnetometer (VSM) demonstrated pure and doped samples exhibited ferromagnetism behavior at room temperature.

The Mixed Magnetic Property of Co0.76Cu0.74[Fe(CN)6]·7.5H2O

2018 ◽  
Vol 71 (11) ◽  
pp. 914
Author(s):  
Yanfang Xia ◽  
Min Liu ◽  
Duxin Li
Keyword(s):  
Magnetic Field ◽  
Magnetic Moment ◽  
Effective Magnetic Moment ◽  
Lattice Parameter ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Patterns ◽  
Co Precipitation ◽  
The Magnetic Field

Co0.76Cu0.74[Fe(CN)6]·7.5H2O was prepared as a powder by a chemical co-precipitation method. The powder X-ray diffraction patterns were indexed to the typical face-centred cubic structure with the lattice parameter a 10.55(2) Å. The temperature dependence of the χ−1 curve obeys the Curie–Weiss law (χ = C/(T – θ)) in the temperature range of 180–300 K. According to Curie–Weiss law, the calculated θ value is −54.82 K. In the paramagnetic state at 300 K, the effective magnetic moment (μeff = (8χT)1/2) is 3.58 μB per formula unit. The calculated theoretical effective magnetic moment is 4.06 μB. The magnetic field cooling measurements under a 200 Oe applied magnetic field show that the saturation magnetization value at 2 K of the complex Co0.76Cu0.74[Fe(CN)6]·7.5H2O is 1.528 emu g−1.

scholarly journals Structural properties and magnetic interactions in Al3+ and Cr3+ co-substituted CoFe2O4 ferrite

2010 ◽  
Vol 8 (2) ◽  
pp. 419-425 ◽  
Author(s):  
Surendra More ◽  
Ram Kadam ◽  
Ankush Kadam ◽  
Dhanraj Mane ◽  
Govind Bichile
Keyword(s):  
Curie Temperature ◽  
Magnetic Interactions ◽  
X Ray Diffraction ◽  
Absorption Bands ◽  
X Ray ◽  
Cr Content ◽  
Phase Spinel ◽  
Cr Substitution ◽  
Xrd Patterns ◽  
Co Precipitation

AbstractA series of CoAlxCrxFe2−2xO4 systems (x = 0.1 to 0.5 in steps of x = 0.1) spinel ferrites have been synthesized successfully using wet chemical co-precipitation technique. The samples were characterized by X-ray diffraction (XRD), infrared spectroscopy (IR) and magnetization measurements. The powder XRD patterns confirm the single phase spinel structure for the materials synthesized. X -ray diffraction measurements were performed to yield the lattice constant as function of the amount x corresponding to Al-Cr substitution. Lattice parameters, X-ray density, bulk density and particle size decrease whereas porosity increases with the increase in Al-Cr content, ‘x’. Infrared studies show two absorption bands at about 400 cm−1 and 600 cm−1 for octahedral and tetrahedral sites, respectively. Saturation magnetization decreases with the increase in Al-Cr content x. AC magnetic susceptibility measurements were carried out as a function of temperature to measure the Curie temperature, which was found to decrease with Al-Cr content x. The decrease of Curie temperature has been explained by A-B interaction.

scholarly journals POTENTIALS OF INFRARED SPECTROSCOPY AND X-RAY STRUCTURAL ANALYSIS IN ASSESSING MINERAL COMPOSITION OF URINARY CONCREMENTS

2020 ◽  
Vol 20 (4) ◽  
pp. 136-140
Author(s):  
S.M. Kolupayev ◽  
E.P. Bereznyak
Keyword(s):  
Infrared Spectroscopy ◽  
Structural Analysis ◽  
Infrared Spectrum ◽  
Mineral Composition ◽  
Urinary Stones ◽  
X Ray Diffraction ◽  
Absorption Bands ◽  
X Ray ◽  
Extracorporeal Shock Wave ◽  
First Choice

This paper presents the results of the combined use of infrared spectroscopy and X-ray structural analysis in assessing the mineral composition of urinary concrement obtained during extracorporeal shock wave lithotripsy in 34 patients with urolithiasis. Registration of infrared spectra was carried out by an IKS-29 (LOMO) infrared spectrophotometer in the spectral range 4000 - 400 cm-1. X-ray structural analysis was carried out by X-ray diffraction using an X-ray diffractometer DRON-4-07. The mineral composition of 22 (64,70%) urinary stone samples according to infrared spectroscopy data, fully corresponded to the data of X-ray structural analysis. Vevellite, hydroxylapatite and uric acid were identified in most stones. In 4 (11,76%) cases, this method did not allow us to identify the phosphate component in the composition of the concrements accurately. Among the mineral components, which had the same characteristics in the infrared spectrum and corresponded to calcium phosphate, during the X-ray structural analysis, hydroxyapatite was identified in 3 (8,82%) cases, and struvite in 1 (2,94%) sample. 8 (23,52%) samples of urinary concrements had an amorphous-crystalline structure, which in the infrared spectrum was characterized by absorption bands corresponding to vevellite. When X-ray diffraction analysis of these samples was carried out, undifferentiated areas in the form of a halo were determined on the diffractogram that pointed out the presence of an amorphous phase. The data obtained demonstrate the potential of using infrared spectroscopy as the first choice method in assessing the mineral composition of urinary stones. X-ray structural analysis can be recommended as a clarifying technique in order to identify the phosphate component of stones of a crystal structure, as well as in the case of detecting rare, atypical minerals.

scholarly journals Zn2+ substituted superparamagnetic MgFe2O4 spinel-ferrites: Investigations on structural and spin-interactions

2020 ◽  
Vol 9 (5) ◽  
pp. 576-587
Author(s):  
Lakshita Phor ◽  
Surjeet Chahal ◽  
Vinod Kumar
Keyword(s):  
Photoelectron Spectroscopy ◽  
Spinel Phase ◽  
Lattice Parameter ◽  
X Ray Diffraction ◽  
Paramagnetic Resonance ◽  
X Ray ◽  
Spin Interactions ◽  
Transmission Electron ◽  
Maximum Magnetization ◽  
Zn Content

Abstract Nano-magnetic ferrites with composition Mg1−xZnxFe2O4 (x = 0.3, 0.4, 0.5, 0.6, and 0.7) have been prepared by coprecipitation method. X-ray diffraction (XRD) studies showed that the lattice parameter was found to increase from 8.402 to 8.424 Å with Zn2+ ion content from 0.3 to 0.7. Fourier transform infrared (FTIR) spectra revealed two prominent peaks corresponding to tetrahedral and octahedral at around 560 and 430 cm−1 respectively that confirmed the spinel phase of the samples. Transmission electron microscopy (TEM) images showed that the particle size was noted to increase from 18 to 24 nm with an increase in Zn content from x = 0.3 to 0.7. The magnetic properties were studied by vibrating sample magnetometer (VSM) and electron paramagnetic resonance (EPR) which ascertained the superparamagnetic behavior of the samples and contribution of superexchange interactions. The maximum magnetization was found to vary from 23.80 to 32.78 emu/g that increased till x = 0.5 and decreased thereafter. Further, X-ray photoelectron spectroscopy (XPS) was employed to investigate the chemical composition and substantiate their oxidation states.

scholarly journals Preparation and Characterization of Manganese Ferrite Aluminates

2008 ◽  
Vol 2008 ◽  
pp. 1-7 ◽  
Author(s):  
R. L. Dhiman ◽  
S. P. Taneja ◽  
V. R. Reddy
Keyword(s):  
Mössbauer Spectra ◽  
Spinel Phase ◽  
Lattice Parameter ◽  
Aluminum Concentration ◽  
Site Preference ◽  
X Ray Diffraction ◽  
Hyperfine Fields ◽  
Ionic Radii ◽  
X Ray ◽  
Mossbauer Spectra

Aluminum doped manganese ferritesMnAlxFe2−xO4with0.0≤x≤1.0have been prepared by the double ceramic route. The formation of mixed spinel phase has been confirmed by X-ray diffraction analysis. The unit cell parameter `aO' is found to decrease linearly with aluminum concentration due to smaller ionic radius of aluminum. The cation distributions were estimated from X-ray diffraction intensities of various planes. The theoretical lattice parameter, X-ray density, oxygen positional parameter, ionic radii, jump length, and bonds and edges lengths of the tetrahedral (A) and octahedral (B) sites were determined.57Fe Mössbauer spectra recorded at room temperature were fitted with two sextets corresponding to Fe3+ions at A- and B-sites. In the present ferrite system, the area ratio of Fe3+ions at the A- and B-sites determined from the spectral analysis of Mössbauer spectra gives evidence that Al3+ions replace iron ions at B-sites. This change in the site preference reflects an abrupt change in magnetic hyperfine fields at A- and B-sites as aluminum concentration increases, which has been explained on the basis of supertransferred hyperfine field. On the basis of estimated cation distribution, it is concluded that aluminum doped manganese ferrites exhibit a 55% normal spinel structure.

Effect of Temperature of Synthesis on X-Ray, Infrared Spectroscopic Study and Magnetic Properties of Magnesium Zinc Ferrites

2013 ◽  
Vol 547 ◽  
pp. 57-69 ◽  
Author(s):  
Sujata. S. Khot ◽  
Neelam S. Shinde ◽  
Bhimrao P. Ladgaonkar ◽  
Bharat B. Kale ◽  
Shrikant C. Watawe
Keyword(s):  
Curie Temperature ◽  
Saturation Magnetization ◽  
Ac Susceptibility ◽  
Lattice Parameter ◽  
Precipitation Method ◽  
Ir Absorption ◽  
Infrared Spectroscopic Study ◽  
X Ray Diffraction ◽  
Absorption Bands ◽  
X Ray

Some physical properties (such as lattice parameter, curie temperature, ac susceptibility) of Mg1-xZnxFe2O4 (where x = 0.3,0.4,0.5,0.6) ferrites have been studied. Magnesium Zinc Ferrites was synthesized by oxalate co-precipitation method at different synthesis temperature and characterized by X-ray diffraction and far IR absorption techniques, scanning Electron microscopy .The lattice parameter were computed. The X-ray diffraction studies reveal the formations of single phase cubic spinel structure.IR absorption bands are observed around 600 cm-1 and 400 cm-1 on the tetrahedral and octahedral sites respectively. Magnetization parameters such as saturation magnetization, and magnetic moment were calculated and the results are discussed with the help of the existing theories. Saturation magnetization was found to be in the range 2 emu/gm to 8.28 emu/gm when the samples were synthesized below 100°C. The variation of A.C. susceptibility with temperature shows the existence of super paramagnetic nature. The Curie temperature was determined from the measurement of the susceptibility verses temperature. The SEM micrograph shows the uniform distribution of the particles, the average size was estimated to be 0. 350 µm.

scholarly journals X-RD, TEM, Magnetic Studies on NixZn1-xFe2O4 (Where x= 0.2, 0.4, 0.5, 0.6 and 0.8) Nano Scale Particles by Chemical Co-Precipitation Method

2015 ◽  
Vol 60 ◽  
pp. 20-24
Author(s):  
B. Suryanarayana ◽  
V. Raghavendra ◽  
K. Chandra Mouli
Keyword(s):  
Average Particle Size ◽  
Lattice Parameter ◽  
Precipitation Method ◽  
Average Particle ◽  
X Ray Diffraction ◽  
Magnetic Studies ◽  
Zinc Nanoparticles ◽  
X Ray ◽  
Xrd Patterns ◽  
Co Precipitation

Nickel zinc nanoparticles NixZn1-xFe2O4 (where x= 0.2, 0.4, 0.5, 0.6 and 0.8) by Chemical Co-Precipitation method. The samples were characterised by X-ray diffraction (XRD), TEM, VSM .The powders of XRD patterns confirm a single spinel crystalline phase with cubic structure formation with no indication of any other secondary or unidentified phase. The lattice parameter changed from 8.336 Å to 8.382 Å. The average particle size ranged 20 to 80 nm was observed by TEM.

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