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Registration Number

0214U000804, 0111U009717 , R & D reports

Title

Fundamental researches of structure and physical properties of superconducting, magnetic and semi conducting materials with the special physical descriptions, perspective for application in atomic industry of Ukraine

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Head

Lavrinenko Sergij Dmitrievich, Finkel Vitaly Olexandrovich, Kutniy Volodymir Yevdokimocich,

Registration Date

17-07-2014

Organization

National Science Center "Kharkiv Institute of Physics and Technology

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For Stage 7 on the following main results 1. Effects of the evolution of the crystal structure and electrical BSS MgB2 superconductor under the influence of the relatively weak thermal and radiation effects. 2. Based on the results of studies of the evolution of the crystal structure and the physical properties under the influence of electron irradiation established the nature and mechanisms of radiation damage by irradiation BSS superconductor MgB2 with high-energy electrons: the appearance of vacancies in the B-B-honeycomb layers of the crystal lattice. 3.Shown that a decrease in the population of positions in the V - V-lattice layers MgB2 reduces energy dimensional ?-bonds V - V and, consequently, narrowing the "large" ?? energy gap at the Fermi surface, from which associated relatively high critical temperature of the superconductor. 4.Found that the application of moderately strong magnetic fields leads to lowering of the critical temperature of the superconductor MgB2 BSS, and the expansion of the superconducting transition. 5. First discovered anomalies dependences of the lattice parameters and intensity of X-ray interferences and electrical BSS superconductor MgB2 by electron irradiation dose, indicating the flow of electronic topological transition when the population of B-sublattice MgB2 due to the formation of vacancies. Pp. - 32, Fig. - 17 Lit. ist. - 53.

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Аржавітін В.М.
Богдан Є.О.
Вєрьовкін А.А.
Дерев'янко В.В.
Мухин В.В.
Наконечний Д.В.
Піроженко Л.О.
Рибка Олександр Вікторович
Серих Л.М.
Соколов С.О.
Сунгуров М.С.
Сухарева Т.В.
Тихоновська Т.М.
Чечина М.В.
Шахов Ю.Н.

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2020-04-02