scholarly journals Structural and Magnetic Properties of Microwave Assisted Sol-Gel Synthesized La0.9Sr0.1MnO3 Manganite Nanoparticles

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Mahin Eshraghi ◽  
Parviz Kameli
Keyword(s):  
Magnetic Properties ◽  
Magnetic Measurements ◽  
Sol Gel ◽  
Hysteretic Behavior ◽  
Rhombohedral Structure ◽  
Susceptibility Data ◽  
Slowing Down ◽  
Transmission Electron ◽  
Manganite Nanoparticles ◽  
Structural And Magnetic Properties

The structural and magnetic properties of nanoparticles of La0.9Sr0.1MnO3 (LSMO) were studied using powder X-ray diffraction (XRD), transmission electron microscope (TEM), and magnetic measurements. The XRD refinement result indicates that samples crystallize in the rhombohedral structure with R-3C space group. The dc magnetization measurements revealed that samples exhibit no hysteretic behavior at room temperature, symptomatic of the superparamagnetic (SPM) behavior. The results of ac magnetic susceptibility measurements show that the susceptibility data are not in accordance with the Néel-Brown model for SPM relaxation but fit well with conventional critical slowing down model which indicates that the dipole-dipole interactions are strong enough to cause superspin-glass-like phase in LSMO samples.

Structural and Magnetic Properties of Cr- and Fe-Doped CeO2 Nanoparticles Prepared by Sol-Gel Method

2016 ◽  
Vol 848 ◽  
pp. 682-687 ◽  
Author(s):  
Sheng Hong Yang ◽  
Yue Li Zhang
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetic Measurements ◽  
Physical Property Measurement System ◽  
Sol Gel ◽  
Physical Property ◽  
Ferromagnetic Behavior ◽  
Sem Images ◽  
Uniform Size ◽  
Structural And Magnetic Properties

A study of the structural and magnetic properties of Cr-and Fe-doped CeO2 nanoparticles produced by the sol–gel-based method was undertaken. The crystal structure and phase, morphology, and magnetic properties of the sample were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy (Raman) and physical property measurement system (PPMS). XRD and Raman studied showed that Cr-and Fe-doped did not change CeO2 original cubic fluorite crystal structure, and no ferromagnetic secondary phase was observed. SEM images showed that Cr-and Fe-doped CeO2 nanoparticles were spherical, uniform size, and good dispersion. The particle size was about 20 nm. The magnetic measurements showed that the Cr-and Fe-doped CeO2 nanoparticles presented ferromagnetic behavior at 10 and 300 K, indicating the Curie temperature was above room temperature. The magnetization diminished with the increase of the temperature. The saturation magnetization and coercivity of Fe-doped CeO2 nanoparticles were higher than that of Cr-doped CeO2 nanoparticles. Combined with the results of XRD and Raman, the ferromagnetic behavior can be attributed to the intrinsic properties of Cr-and Fe-doped CeO2 nanostructures.

scholarly journals Structural and Magnetic Properties of La0.9Sr0.1MnO3 Nanoparticles Prepared via Sol-gel Process

2019 ◽  
Vol 70 (6) ◽  
pp. 2044-2047
Author(s):  
Alexandru-Horatiu Marincas ◽  
Firuta Goga ◽  
Roxana Dudric ◽  
Crina Suciu ◽  
Alexandra Avram ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Measurements ◽  
Sol Gel ◽  
Thermo Gravimetric Analysis ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
Thermo Gravimetric ◽  
X Ray ◽  
Transmission Electron ◽  
Sol Gel Process

In the present paper, nanosized La0.9Sr0.1MnO3 particles were synthesized via a facile modified sol-gel route using two cheap and environmentally friendly organic chemicals, namely sucrose and pectin. The obtained powders were characterized by thermo gravimetric analysis (TGA), X-ray diffraction (XRD), transmission electron microscopy (TEM), and magnetic measurements. The optimal temperature for obtaining nanosized particles was determined as 1000�C and 1h dwell time was enough to obtain crystalline nanoparticles. Magnetic properties of samples calcined with different calcination period were analyzed and both samples shown a transition temperature around 274 K.

Structural and Magnetic Properties of Mn/Fe co-Doped ZnO Thin Films Prepared by Sol–Gel Technique

2014 ◽  
Vol 50 (8) ◽  
pp. 1-4 ◽  
Author(s):  
Robina Ashraf ◽  
Saira Riaz ◽  
Mahwish Bashir ◽  
Usman Khan ◽  
Shahzad Naseem
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Sol Gel ◽  
Zno Thin Films ◽  
Gel Technique ◽  
Structural And Magnetic Properties ◽  
Doped Zno ◽  
Co Doped

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

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

Influence of Alloying Additions on Enhancement of Soft Magnetic Properties Effect and Crystallization in FeXSiB (X=Cu, V, Co, Zr, Nb) Amorphous Alloys

2007 ◽  
Vol 130 ◽  
pp. 171-174 ◽  
Author(s):  
Z. Stokłosa ◽  
G. Badura ◽  
P. Kwapuliński ◽  
Józef Rasek ◽  
G. Haneczok ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloys ◽  
Crystallization Process ◽  
Annealing Temperature ◽  
Magnetic Measurements ◽  
X Ray Diffraction ◽  
Soft Magnetic ◽  
X Ray ◽  
Second Stage ◽  
Transmission Electron

The crystallization and optimization of magnetic properties effects in FeXSiB (X=Cu, V, Co, Zr, Nb) amorphous alloys were studied by applying X-ray diffraction methods, high resolution transmission electron microscopy (HRTEM), resistometric and magnetic measurements. The temperatures of the first and the second stage of crystallization, the 1h optimization annealing temperature and the Curie temperature were determined for different amorphous alloys. Activation energies of crystallization process were obtained by applying the Kissinger method. The influence of alloy additions on optimization effect and crystallization processes was carefully examined.

Structural and magnetic properties of yttrium iron garnet nanoparticles doped with copper obtained by sol gel method

2019 ◽  
Vol 236 ◽  
pp. 547-549 ◽  
Author(s):  
L.R.F. Leal ◽  
Y. Guerra ◽  
E. Padrón-Hernández ◽  
A.R. Rodrigues ◽  
F.E.P. Santos ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Yttrium Iron Garnet ◽  
Sol Gel ◽  
Yttrium Iron ◽  
Gel Method ◽  
Sol Gel Method ◽  
Structural And Magnetic Properties ◽  
Iron Garnet
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