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Information × Registration Number 0218U001418, 0116U000827 , R & D reports Title Evolution of the material properties of polyfunctional purposes under extreme external factors popup.stage_title Head Ruslan Vovk, Доктор фізико-математичних наук Registration Date 13-03-2018 Organization Kharkov National University named after V.N. Karazin popup.description2 Objects of research: the electrical conductivity and oxygen coalescence in HTSC YBa2Cu3O7- and НоВа2Сu3О7-?; electro- and thermal conductivity of the MAX-phase Ti3AlC2. The purpose of the stage is to study the peculiarities of the charge and heat transport, including under the influence of exposure to electrons. The research method is an experimental determination of these properties, depending on external factors - temperature and irradiation; analysis of the obtained dependencies. The effect of electron irradiation on the conductivity in the basal plane, (T), of YBa2Cu3O7-? single crystal is investigated. The paraconductivity exists from the temperature of the appearance of the pseudogap state to the fluctuation conduction regime. Electronic irradiation leads to the expansion of the temperature range of the pseudogap state. The transition to the superconducting state is diffused due to the heterogeneity of the material structure, and the presence of fluctuation Cooper pairs above Tc. The evolution of a defective structure can be associated with the diffusion coalescence of oxygen clusters. In the MAX phase Ti3AlC2 the heat transfers both by electrons and phonons, but the part of phonon heat transfer decreases with increasing temperature. The results of research can be used to create a materials with predefined characteristics. Product Description popup.authors В. Шкловський Г. Хаджай Е. Геворкян Л. Холодилова О. Гриб Р. Вовк Ю. Бойко popup.nrat_date 2020-04-02 Close