Search academic texts

Information × Registration Number 0225U001749, (0122U000388) , R & D reports Title Optical, magnetic and thermoelectric properties of the new nanocomposites based on oxide materials popup.stage_title Оптичні, магнітні та термоелектричні властивості новітніх нанокомпозитів на основі оксидних матеріалів Head Ievtushenko Arsenii I., Кандидат фізико-математичних наук Registration Date 06-02-2025 Organization Frantsevich Institute for Problems of Materials Science National Academy of Science of Ukraine popup.description1 The purpose of scientific work is: 1) development of technology for growing films and nanostructures based on ZnO, which is aimed at improving their optical characteristics and photocatalytic activity; 2) study of the influence of exchange f-d interaction, which occurs at the interface of Fe, Co, Ni and REM oxides, on the features of tunneling magnetoresistance of three-layer nanocomposite structures Fe, Co, Ni / REM oxide / Fe, Co, Ni depending on their deposition conditions ; 3) study of the features of electrical, galvanomagnetic, magnetic and magneto-optical effects in ferromagnetic nanocomposites based on oxide matrix Al2O3, SiO2 and TiO2 with Co nanoparticles depending on the growth conditions. popup.description2  The objects of research are thin films of ZnO, ZnO:Al, NiO, CuAl2O4, nanostructures of ZnO, ZnO:Ag, ZnO:Co, film structures of Fe/Gd2O3, Fe/Y2O3, ferromagnetic nanocomposites (FMNC) of Co/Al2O3, Co/SiO2 and Co/TiO2. The purpose of scientific research is to develop and optimize the technology for growing and doping film oxide materials and to study the features of their electrical, optical, magnetic and galvanomagnetic effects depending on the conditions of their growth. The results of studies of the properties of ZnО:Al, NiO, CuAl2O4 films and ZnO, ZnO:Ag, ZnO:Co nanostructures are presented, which reveal the relationship between the technological parameters of deposition on the one hand and the structure, optical, electrical and photocatalytic properties on the other, which are important for the creation of optoelectronic devices, photovoltaics and new photocatalysts. The electronic and adsorption properties of 2D ZnO/graphene heterostructures are studied. It is shown that the energy heterogeneity caused by charge transfer between 2D ZnO and graphene affects the hydrogen adsorption energy. The study highlights the critical role of defect engineering in understanding the properties of 2D ZnO/graphene, and creates prerequisites for the development of more efficient catalytic hydrogen evolution reactions. The mechanism of increasing the thermoelectromotive force in FMNCs Co/Al2O3, Co/SiO2 and Co/TiO2 in a magnetic field at low temperatures due to the localization of spin-dependent transport was investigated and explained, which can be used to create magnetosensitive devices (sensors) in extreme temperature conditions. The effect of the f-d exchange interaction between the REM and Fe oxide layers on the optical properties and frequency dependence of the magnetoresistance of bilayer structures Fe/Gd2O3 and Fe/Y2O3 grown by the electron beam deposition method was revealed, which can be used to create magnetosensor devices. Product Description popup.authors Yevtushenko Arsenii I. Baibara Oleksii Ye. Bugaiova Maryna E. Vyshnevska Kseniia O. Didus Roman I. Dmytriiev Oleksandr I. Dranchuk Mykola V. Karavaieva Valentyna M. Karpyna Vitalii A. Kasumov Anatolii M. Kovalskyi Yurii O. Korotkov Kostiantyn A. Lemish Anatolii Ye. Lendel Vasyl V. Myroniuk Denys V. Myroniuk Liliia A. Olifan Olena I. Petrosyan Larisa I. Radchenko Mykhailo V. Staryk Serhii P. Strelchuk Viktor V. Fiialka Liudmyla I. Shtepliuk Ivan I. popup.nrat_date 2025-02-06 Close