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Information × Registration Number 0223U001410, 0122U001302 , R & D reports Title Heat and charge transfer in iron-based nanocomposite compounds: electroconsolidated permalloys and iron-containing superconductors popup.stage_title Head Vovk Ruslan V., Доктор фізико-математичних наук Registration Date 28-01-2023 Organization V.N. Karazin Kharkiv National University popup.description2  Research object: heat and charge carrier scattering processes in the iron-containing superconductor FeSe. The purpose of the research: to establish the mechanisms of dispersion of charge carriers and heat in FeSe. Research method – experimental determination of electrical resistance and thermal conductivity in the range from 4.2 K to 300 K; analysis of the obtained dependencies. The temperature dependence of the electrical resistance and thermal conductivity of the iron-containing superconductor FeSe0.94 in the range from 4.2 K to 300 K after annealing at room temperature in air for 7 years was studied. Compared to the freshly prepared sample, long-term annealing led to a significant decrease in the temperature of the superconducting transition. The temperature dependences of the electrical resistance both for a freshly made sample and after a long-term annealing are due to the scattering of electrons by phonons and defects. Heat transfer in the sample is mainly phonon, which is limited by phonon scattering at the boundaries of the sample, at dislocations, at point defects, and by phonon-phonon scattering. Compared to a freshly prepared sample, long exposure caused a significant increase in the number of dislocations, point defects and intensification of phonon-phonon scattering. No influence of the structural phase transition at T  75 K from the tetragonal phase to the orthorhombic phase was found on both electrical resistance and thermal conductivity. Product Description popup.authors Vovk Ruslan Volodimirovich Kislitsa Maksym Valeriiovych Khadzhai Georhiy Ya Chykina Olena Leonidivna popup.nrat_date 2023-01-28 Close