Study on structure and magnetic properties of Cr3+-doped Ni–Cu–Co ferrites prepared by sol–gel method

In this paper, nickel nitrate, copper nitrate, cobalt nitrate, ferric nitrate were used as raw materials, citric acid was used as a complexing agent, and chromium nitrate was used as a modifier to synthesize [Formula: see text] by sol–gel method. The sample was characterized. X-ray diffraction (XRD) data on the sample showed that the particle size of the sample was 52.14–54.88 nm. The lattice constant varied from 8.3569 Å to 8.3758 Å. The data of Fourier infrared showed that the sample did not change with the structure of the doped sample of Cr ion and remained as the spinel type. It can be seen by SEM that the sample is irregularly spherical. Due to the doping of chromium ions, it appears agglomerated. Analysis of the elements of the sample by EDAX revealed that the sample contained Ni, Cu, Co, Fe, O and a peak corresponding to the Cr element was found in the sample having crion content of 0.025, 0.050, 0.075 and 0.100. The magnetic properties of the samples were characterized using VSM. The data are processed to obtain magnetic parameters such as saturation magnetization and coercivity.

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Magnetic Properties of Bulk Zn0.95-XMnXFe0.05O2 Prepared by Sol-Gel Method and Subsequent Hot Pressing

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.268-270.356 ◽

2011 ◽

Vol 268-270 ◽

pp. 356-359 ◽

Cited By ~ 1

Author(s):

Wen Song Lin ◽

C. H. Wen ◽

Liang He

Keyword(s):

Magnetic Properties ◽

Photoelectron Spectroscopy ◽

Raw Materials ◽

Sol Gel ◽

Secondary Phase ◽

X Ray Diffraction ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Doped Zno

Mn, Fe doped ZnO powders (Zn0.95-xMnxFe0.05O2, x≤0.05) were synthesized by an ameliorated sol-gel method, using Zn(CH3COO)2, Mn(CH3COO)2and FeCl2as the raw materials, with the addition of vitamin C as a kind of chemical reducer. The resulting powder was subsequently compacted under pressure of 10 MPa at the temperature of 873K in vacuum. The crystal structure and magnetic properties of Zn0.95-xMnxFe0.05O2powder and bulk samples have been investigated by X-ray diffraction (XRD) and vibrating sample magnetometer (VSM). X-ray photoelectron spectroscopy (XPS) was used to study chemical valence of manganese, iron and zinc in the samples. The x-ray diffraction (XRD) results showed that Zn0.95-xMnxFe0.05O (x≤0.05) samples were single phase with the ZnO-like wurtzite structure. No secondary phase was found in the XRD spectrum. X-ray photoelectron spectroscopy (XPS) showed that Fe and Mn existed in Zn0.95-xMnxFe0.05O2samples in Fe2+and Mn2+states. The results of VSM experiment proved the room temperature ferromagnetic properties (RTFP) of Mn, Fe co-doped ZnO samples.

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Annealing Effects on the Physical and Magnetic Properties of Tb1.5Y1.5Fe5O12 Films Nanoparticles Prepared by Sol-Gel Method

Materials Science Forum ◽

10.4028/www.scientific.net/msf.756.91 ◽

2013 ◽

Vol 756 ◽

pp. 91-98 ◽

Cited By ~ 2

Author(s):

Ftema W. Aldbea ◽

Noor Bahyah Ibrahim ◽

Mustafa Hj. Abdullah

Keyword(s):

Particle Size ◽

Magnetic Properties ◽

Annealing Temperature ◽

Quartz Substrate ◽

Sol Gel ◽

Lattice Parameter ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Iron Garnet

Terbium –substituted yttrium iron garnet (Tb1.5Y1.5Fe5O12) films nanoparticles were successfully prepared by a sol-gel method. The films were deposited on the quartz substrate using spin coating technique. To study effect of annealing temperature, the annealing process was executed at 700, 800 and 900 °C in air for 2 hours. The X-ray diffraction (XRD) proved that the pure phase of garnet structure was detected for the film annealed at 900 °C. The lattice parameter increased with the increment of annealing temperature and the highest value of 12.35 Å was obtained at 900 °C. Field Emission Scanning Electron Microscope (FE-SEM) results showed that the particle size increased from 43nm to 56nm as annealing temperature increased from 700 to 900°C. The film’s thickness also affected by increasing of annealing temperature and become thin at 900 °C due to densification process occurred at high annealing temperature. The elemental compositions of the Tb1.5Y1.5Fe5O12 film were detected using an Energy Dispersive X-raySpectroscopy (EDX). Magnetic properties at room temperature were measured using a Vibrating Sample Magnetometer (VSM).The saturation magnetization Ms increased with the annealingtemperature and showed a high value of 104emu/cm3, but the coercivity Hc of the film was decreased due to the increment of the particle size. Normal 0 21 false false false MS X-NONE X-NONE MicrosoftInternetExplorer4 Terbium –substituted yttrium iron garnet (Tb1.5Y1.5Fe5O12) films nanoparticles were successfully prepared by a sol-gel method. The films were deposited on the quartz substrate using spin coating technique. To study effect of annealing temperature, the annealing process was executed at 700, 800 and 900°C in air for 2 hours. The X-ray diffraction (XRD) proved that the pure phase of garnet structure was detected for the film annealed at 900 °C. The lattice parameter increased with the increment of annealing temperature and the highest value of 12.35 Å was obtained at 900 °C. Field Emission Scanning Electron Microscope (FE-SEM) results showed that the particle size increased from 43nm to 56nm as annealing temperature increased from 700 to 900 °C. The film’s thickness also affected by increasing of annealing temperature and become thin at 900 °C due to densification process occurred at high annealing temperature. The elemental compositions of the Tb1.5Y1.5Fe5O12 film were detected using an Energy Dispersive X-ray Spectroscopy (EDX). Magnetic properties at room temperature were measured using a Vibrating Sample Magnetometer (VSM).The saturation magnetization Ms increased with the annealing temperature and showed a high value of 104emu/cm3, but the coercivity Hc of the film was decreased due to the increment of the particle size. st1\:*{behavior:url(#ieooui) } /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}

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Magnetic properties of Fe and Co codoped SnO2 prepared by sol-gel method

Journal of Applied Physics ◽

10.1063/1.3651468 ◽

2011 ◽

Vol 110 (8) ◽

pp. 083901 ◽

Cited By ~ 60

Author(s):

K. Nomura ◽

J. Okabayashi ◽

K. Okamura ◽

Y. Yamada

Keyword(s):

Magnetic Properties ◽

Sol Gel ◽

Gel Method ◽

Sol Gel Method

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Structural and Magnetic Properties of CoAl0.1Fe1.9O4 Thin Films Prepared by a Sol-Gel Method

phys stat sol (a) ◽

10.1002/1521-396x(200202)189:3<883::aid-pssa883>3.0.co;2-s ◽

2002 ◽

Vol 189 (3) ◽

pp. 883-887

Author(s):

Sam Jin Kim ◽

Woo Chul Kim ◽

In Bo Shim ◽

Chul Sung Kim ◽

Seung Wha Lee

Keyword(s):

Thin Films ◽

Magnetic Properties ◽

Sol Gel ◽

Gel Method ◽

Sol Gel Method ◽

Structural And Magnetic Properties

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98/02045 CO hydrogenation over nanometer spinel-type Co/Mn complex oxides prepared by sol-gel method

Fuel and Energy Abstracts ◽

10.1016/s0140-6701(98)80248-8 ◽

1998 ◽

Vol 39 (3) ◽

pp. 186

Keyword(s):

Co Hydrogenation ◽

Sol Gel ◽

Complex Oxides ◽

Spinel Type ◽

Gel Method ◽

Sol Gel Method

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The Structural, Magnetic and Optical Properties of Ni-Mg-Zn Ferrite Prepared With Different Complexing Agents via Sol-Gel Method

10.21203/rs.3.rs-263070/v1 ◽

2021 ◽

Author(s):

Yanchun Zhang ◽

Aimin Sun ◽

Zhaxi Suonan

Keyword(s):

Optical Properties ◽

Electron Microscope ◽

Sol Gel ◽

Complexing Agents ◽

Complexing Agent ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Zn Ferrite ◽

Vis Spectroscopy

Abstract Different complexing agents were used to prepare Ni-Mg-Zn ferrite with the composition formula Ni0.2Mg0.2Zn0.6Fe2O4 via sol-gel method, which included citric acid, oxalic acid, egg white and EDTA. The Ni0.2Mg0.2Zn0.6Fe2O4 ferrite with no complexing agent was also prepared as a comparison. The chemical phases of samples were analyzed by the X-ray diffraction (XRD), which indicated that samples had spinel phase structure. The lattice constants of samples are in the range of 8.3980 ~ 8.4089 Å. The composition and structure were further studied by fourier transform infrared spectroscopy (FTIR). There were two typical characteristic bands related to the stretching vibrations of spinel ferrite in FTIR spectra. Scanning electron microscope (SEM) micrographs and transmission electron microscope (TEM) images showed that the particles have the shape of spherical cube. Energy dispersive spectrometer (EDS) analyzed the elements and ingredients of samples, which included Ni, Mg, Zn, Fe and O. X-ray photoelectron spectroscopy (XPS) is used to examine further the elemental composition and chemical state of sample prepared with EDTA as complexing agent. The optical properties of samples were investigated by photoluminescence spectra and UV-Vis spectroscopy. Vibrating sample magnetometer (VSM) was used to characterize magnetic properties, hysteresis loops revealed the ferrimagnetism behavior of prepared samples.

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Effect of annealing temperature on structural and magnetic properties of Co2TiO4 ceramics prepared by sol-gel method

Ceramics International ◽

10.1016/j.ceramint.2018.12.187 ◽

2019 ◽

Vol 45 (6) ◽

pp. 6906-6911 ◽

Cited By ~ 2

Author(s):

Q.S. Fu ◽

C.L. Li ◽

B. Meng ◽

C. Chakrabarti ◽

R. Zhang ◽

...

Keyword(s):

Magnetic Properties ◽

Annealing Temperature ◽

Sol Gel ◽

Gel Method ◽

Sol Gel Method ◽

Structural And Magnetic Properties

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Synthesis of Aluminum Titanate Powder at Low Temperature via Nonhydrolytic Sol-Gel Method by Using Aluminum Powder

Materials Science Forum ◽

10.4028/www.scientific.net/msf.745-746.673 ◽

2013 ◽

Vol 745-746 ◽

pp. 673-678 ◽

Cited By ~ 1

Author(s):

Wei Hui Jiang ◽

Zhi Fang Xu ◽

Jian Min Liu ◽

Qing Xia Zhu ◽

Quan Zhang

Keyword(s):

Low Temperature ◽

Aluminum Powder ◽

Raw Materials ◽

Sol Gel ◽

Aluminum Titanate ◽

Gel Method ◽

Sol Gel Method ◽

Transmission Electron ◽

Oxygen Donor ◽

Metal Aluminum

Aluminum titanate (Al2TiO5) powder has been synthesized at low temperature via nonhydrolytic sol-gel method by using aluminum powder as aluminum source, titanium tetrachloride as titanium source, anhydrous ethanol as oxygen donor with different catalysts. The phase transformation of aluminum titanate xerogel powder during heat treatment and the influence of the mixing orders of raw materials, catalyst kinds on the synthesis of aluminum titanate were investigated by means of differential-thermal analysis (DTA-TG), X-ray diffraction (XRD), transmission electron microscope (TEM). The results indicated that aluminum titanate powder was easily synthesized at 750 °C by using AlCl3 as catalyst with a mixing order of adding TiCl4 before AlCl3 into aluminum alcohol mixture. The catalytic order of the different catalysts in the preparation process of aluminum titanate is: FeCl3> AlCl3> MgCl2. The catalyst promoted the activation of metal aluminum powder and played a major role in the synthesis of aluminum titanate powder at low temperature via nonhydrolytic sol-gel method.

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