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Information × Registration Number 0216U003148, 0113U000481 , R & D reports Title Formation of ferromagnetic impurity nanostructures of transition elements and spin glass phase in cubic and layered crystals popup.stage_title Head Slynko Evgen; Kovalyuk Zakhar, Registration Date 14-01-2016 Organization Chernivtsi Department of the I.M. Frantsevich Institute for Problems of Materials Science of the National Academy of Sciences of Ukraine popup.description2 Objects of the research are multicomponent solid solutions of cubic crystals A4B6 (PbTe, SnTe, GeTe) doped with Sc, Ti, V, Cr, Mn, Fe, Eu impurities; A3B6 layered crystals (GaSe, InSe, In2Se3, InTe) and (A5)2(B6)3 (Vi2Te3, Vi2Se3) intercalated with magnetic impurities (Fe, Co, Ni), Bi(93.99)Mn(6)Fe(0,01). Purpose of the work is obtaining of ferromagnetic ordered mictomagnets of the cubic and layered crystals with spin glass phase suitable for use in spin electronics. Methods of the study are X-ray fluorescence analysis, X-ray diffraction, electron and atomic force microscopy, static and dynamic magnetometry, galvanomagnetic measurements. Result of the work is obtaining of the new mictomagnets based on A4B6, A3B6 and (A5)2(B6)3 containing impurity nanoclusters and spin glass phase (in alloyed A4B6) which physical properties were studied in detail. A model of electronic structure rearrangement for diluted magnetic semiconductor alloys based on A4B6 with deep and resonant impurity levels is proposed which considers changing of the doping level and pressure. Magnetic order and magnetic inhomogeneity in the solid solutions of lead telluride, tin and germanium doped with impurities of transition metals are investigated. They revealed the existence of two magnetic subsystems - ferromagnetic and spin glass ones. A model of gradual crystal matrix filling with impurity atoms is proposed which suggests three limits of its solubility: in cationic sublattice, within nanoclusters and in volume of second phase microclusters. Crystal structure and physical properties of the new nanocomposite structures consisting of magnetoactive intercalant layers and nonmagnetic semiconductor are investigated. It is shown that introduction of intercalant in the matrix of layered crystal leads to ferromagnetic ordering. It was established that magnetic field gradient on the interface "crystal-electrolyte" causes intercalant localization which increases the lateral size of the nanostructures and changes magnetic properties of the layered crystals. Product Description popup.authors Іванов В.І. Боледзюк В.Б. Водоп'янов В.М. Камінський В.М. Кудринський З.Р. Пирля М.М. Слинько В.Є. popup.nrat_date 2020-04-02 Close