ИСТИНА

Фундаментальная научная проблема, на решение которой направлен проект, - создание новых магнитных материалов для спинтроники и магнитоэлектроники на основе упорядоченных интерметаллических соединений. Это включает как синтез магнитно-чистых, гомогенных веществ с заданными составом, мотивом кристаллической структуры и воспроизводимыми свойствами, так и системное установление факторов, позволяющих варьировать конкретные физико-химические свойства получаемых материалов, критически важные с материаловедческой точки зрения.

The fundamental scientific problem, to the solution of which this project aims to contribute, is the creation of new magnetic materials for spintronics and magnetronics based on ordered intermetallic compounds. This includes both the synthesis of new magnetically ordered phases and the systematic establishment of the factors that allow to control specific physical and chemical properties of the resulting materials. The relevance, scientific and practical significance and novelty of the project arise from the proposed approach to the creation of new magnetic materials, in which the formation of magnetic heterostructures is carried out not at the physical level, but at the intrinsic crystal structure level, which may allow a major leap in the creation of nanoelectronic devices. For the formation of such structures, one of the most promising objects are ordered intermetallics containing magnetic centers. The solution to this task, including the development of approaches to the design of given structures, the identification of correlations between composition, structural motif and magnetic properties will allow to increase an insight into the magnetism in complex intermetallic systems and will become an important step towards the use of such compounds in spintronics. As the focus of the research, we offer several related unique types of structures based on stable intermetallic fragments, which should provide variability and wide possibilities for fine control of the magnetic structure. This new concept targets the combination of two different types of structural blocks in the composition of a single intermetallic. The first building block is an intermetallic with the AuCu3 structure based on group 10 metals with the inclusion of 3d-metals that form a magnetic d-subsystem. The second block for the formation of heterostructures may be either binary or ternary, and contain d- or f-metals. Such an approach provides an ideal matrix for the selective switching "on/off" of magnetic subsystems, as well as fine-tuning of magnetic interactions. At the core of the experimental part of the work on the project is a wide but focused search for new compounds in the systems of the R-T-X-Q type (R – RE or AE metal; T – group 10 metal, X – 3d- or p-metal; Q – element of group 14-15 ), which limits the search to certain compositions. The specific task of creating scientific foundations for the design and control of the properties of magnetic heterostructures based on stable intermetallic fragments includes: - Design and directed search of new compounds formed by the combination of AuCu3-type blocks based on group 10 metals with other intermetallic fragments or their derivatives containing one or more magnetic subsystems; - Development of methods for the synthesis of single-phase intermetallics of the specified types, methods for the growth of single crystals for the determination of the crystal structure and galvanomagnetic measurements; - Determination of the crystal and electronic structure of new compounds; - Experimental determination of the magnetic properties of new compounds; - Establishment of the «composition-structure-properties» relationships for new compounds, development of mechanisms for chemical tuning of critically important characteristics of magnetic subsystems. As a result, we expect to obtain new magnetic heterostructures based on intermetallic fragments, for which the mechanisms will be proposed to control the magnetic properties. A strategy for the practical application of new compounds as the basis for effective materials for spintronics will be developed. The solution of the project's tasks will contribute to the increase in insight on the fundamentals of the magnetism in complex metallic systems and the development of materials for devices for the accumulation, storage and processing of information, which is listed among the critical technologies of the Russian Federation.

В результате выполнения проекта будет получен целый ряд новых магнитных гетероструктур на основе интерметаллических фрагментов, богатых металлами 10-й группы, установлено их кристаллическое и электронное строение, охарактеризована химическая связь и детально исследованы магнитные свойства. Успешное решение задач проекта будет способствовать углублению фундаментальных представлений о магнетизме сложных металлических систем на основе d- и f-металлов, а также использованию полученных соединений в качестве основы для разработки материалов для устройств накопления, хранения и обработки массивов информации, что входит в перечни критических технологий Российской федерации и соответствует направлениям: Н1 «Переход к передовым цифровым, интеллектуальным производственным технологиям, роботизированным системам, новым материалам и способам конструирования, создание систем обработки больших объемов данных, машинного обучения и искусственного интеллекта» стратегии НТР Российской Федерации.