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The bare magnetic Mn0.5Zn0.5Fe2O4 nanoparticles were prepared by the hydro-thermal method. The optimized preparation conditions were obtained by the orthogonal experiment. Crystal structure and the grain diameter of the particles were observed by X-ray Diffraction (XRD) and Transmission Electron Microscope (TEM), and the Curie temperature of the bare particles and the performance of the magnetic moment...
In this paper, the magnetic properties of p-type Zn1-xMnxO powders are reported. This are prepared from the decomposition of an oxalate precursor Zn1-xMnxC2O4.H2O. The oxalate precursor is obtained by coprecipitation of 50 ml of a 0.4mol/L aqueous solution of Zn and Mn acetates and the same volume of a 0.4 mol/L solution of oxalic acid. The mixed solution is stirred for 2h at room temperature. We...
The morphology and optical properties of Zn1-xMnxO films were synthesized by sol gel method using spin coating technique. Zn1-xMnxO thin films is prepared using 2-methoxyethanol solution of zinc acetate dehydrate and manganese acetate tetrahydrate. The solution is stabilized by MEA. The quantity of Mn in the sol was varied from x = 0,0.02, 0.04, 0.06 and 0.08 with annealing temperature of 600°C. Investigation...
We synthesized new multi-components spinel ferrite including Ni, Mn, Zn, Co, and Fe in order to improve the magnetic properties in nanosized particles by using a chemical coprecipitation method. The samples were synthesized in the mole ratios of MxMyFe(1_x+y)OldrFe2O3 (Mx My=Ni, Mn, Zn, Co, 0<Mx+My<1), and the maximum saturation magnetizations of them were measured by VSM. XRD patterns of Mx...
We investigated the dependence of magnetic properties with composition in nanocrystalline Mn-Zn ferrites. Ferrite crystals were synthesized by a modified coprecipitation route where nucleation and crystal growth conditions were controlled during the reaction of 0.011M Fe(III) and 0.055M[Zn(II) + Mn(II)] solutions under alkaline conditions. When doping, suitable amounts of Gd(III) or Eu(III) salts...
In this paper, nonmagnetic elements (Al and Cu) doping effect on the structural and magneto-transport properties of Zn0.85Mn0.15O (ZnMnO) dilute magnetic semiconductors were reported. The structural characterization was performed using XRD, Raman spectroscopy, AFM and SEM. Temperature dependent electrical resistivity, Hall effect, and were carried out using a standard magneto-transport set-up.
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