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Information × Registration Number 0225U002556, (0122U001302) , R & D reports Title Heat and charge transfer in iron-based nanocomposite compounds: electroconsolidated permalloys and iron-containing superconductors popup.stage_title Дослідження штучних надпровідних гетероструктур. Head Vovk Ruslan V., Доктор фізико-математичних наук Registration Date 19-03-2025 Organization V.N. Karazin Kharkiv National University popup.description1 Investigation of the relationship between composite composition and electroconsolidation conditions on the one hand, and transport and magnetic characteristics on the other hand, for composite permaloids; establishment of mechanisms for dissipation of heat and charge carriers in iron-containing superconductors in a wide range of temperatures; study of transport properties and energy dissipation in HTSC with twins or artificial places of pinning with transport current in magnetic field depending on temperature, magnetic field and transport current popup.description2  Object of research: processes of scattering of charge carriers and heat in iron-containing superconductor FeSe, electroconsolidated metallic composite Fe–Ni and in high-temperature superconductors Y-Ba-Cu-O. Research method: experimental determination of electrical resistance and thermal conductivity in the range 4.2–300 K; analysis of the obtained dependences. The aim of the study: to establish the mechanisms of charge carrier and heat dissipation in FeSe, Fe–Ni and in the Y-Ba-Cu-O HTSС. The temperature dependences of the electrical resistance and thermal conductivity in the range of 4.2–300 K of the iron-containing superconductor FeSe0.94 after annealing at room temperature in air for 7 years; of the electroconsolidated equiatomic Fe–Ni were studied. For the Y-Ba-Cu-O HTSC, the effect of irradiation (electrons E0.5–2.5 MeV, fluences up to 70·1018 cm–2) on the electrical resistivity in the range Tc–300 K was studied. The transport of charge and heat in these materials is limited by the scattering of carriers on phonons and defects. Long-term annealing of FeSe0.94 led to a significant decrease in the superconducting transition temperature, an increase in the defectivity and an intensification of phonon-phonon scattering. The thermal and electrical conductivity of electroconsolidated Fe–Ni are higher than the corresponding values of molten samples and can be theoretically estimated. Irradiation of Y-Ba-Cu-O HTSC leads to the appearance of a significant number of defects, which causes a decrease in anisotropy, intensification of scattering processes, a decrease in Tc and an expansion of the superconducting transition. Product Description popup.authors Vovk Ruslan V. Kyslytsia Maksym V. Korobkov Maksym V Obolenskyi Yevhen M. Samsonik Oleksandr L. Khadzhai Heorhii Ya. Kholodilova Ludmila T. Chykina Olena L. popup.nrat_date 2025-03-19 Close