SYNTHESIS, STRUCTURE AND MAGNETIC PROPERTIES OF PURE AND SAMARIUM DOPED MAGNETITE NANOPARTICLES
O. E. Polozhentsev1, S. P. Kubrin2, V. V. Butova1, V. K. Kochkina1, A. V. Soldatov1, V. V. Stashenko2
1Southern Federal University, Rostov-on-Don, Russia
2Research Institute of Physics, Rostov-on-Don, Russia
Keywords: наночастицы, магнетит, маггемит, FeO, γ-FeO, допирование, редкоземельные элементы, XANES спектроскопия, мессбауэровская спектроскопия, вибрационный магнитометр, magnetite, maghemite, nanoparticles, doping, rare earth elements, XANES spectroscopy, Mössbauer spectroscopy, vibrating magnetometer
Abstract
In this paper, a study of pure and doped samarium magnetite nanoparticles synthesized using a microwave synthesis in aqueous solution was performed. The shape, size and structure of the pure and samarium doped magnetite nanoparticles were determined by X-ray diffraction, transmission electron microscopy, X-ray absorption spectroscopy and Mössbauer spectroscopy. The magnetic properties of the nanoparticles were investigated using a vibrating sample magnetometer. It was found that the samarium doped magnetite nanoparticles were superparamagnetic with high saturation magnetization. The doping with a small amount of samarium allowed to reduce the size of nanoparticles, their size distribution, increase resistance to oxidation and improve their magnetic characteristics.
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