engleski

Investigation of nanocrystalline tungsten‐ and tellurium‐based triple perovskites

Specific structure of perovskite compounds provides them with various interesting properties which vary from magnetic and electric properties to magnetic frustration and half‐metallicity. Because of their properties they can be found in numerous technological applications such as transducers, memory devices, solar cells, etc. A3B2(W/Te)O9 (A=Sr, Ba ; B=Fe, Co) triple perovskites have been prepared in nanocrystalline form using a modified sol‐gel route with citric acid as a chelating agent. These materials have been studied by X‐ray powder diffraction (PXRD), X‐ ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and unpolarized Raman spectroscopy, while their magnetic properties have been determined using SQUID measurements. Similar research has already been done with tellurium‐ and tungsten‐ based perovskites. In this research the advances of solution chemistry methods (bottom up approach), namely sol‐gel citrate route, over the solid state routes towards the synthesis of complex perovskite structures will be presented.

perovskites ; multiferroics ; sol-gel ; tungsten ; tellurium

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