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Invited researcher Ono Teruo
Time span of the project
2021-2023
General information

The development of big data processing and decision-making technologies, including artificial intelligence systems, requires a highly productive and energy efficient component base. One of the directions of the development of modern electronics is spintronics and spin-orbitronics, where the electron spin is manipulated instead of the charge. In recent years, research indicates that ferrimagnetics possess a higher potential for the solution of these problems than ferromagnetics. A small value of the resultant magnetic moment gives a number of advantages: stability and the minimal size of spin textures, a high operating speed and a high energy efficiency.

Name of the project: Ferrimagnetic spin-orbitronics

Strategy for Scientific and Technological Development Priority Level: а
Goals and objectives

The main goal of the scientific survey is the search for fundamental mechanisms of the control of the spin texture and the magnetic parameters of ferrimagnetics via spin-orbital effects for the formation of scientific and technological foundations of a new generation of intelligent electronics and the creation of heterostructures with ferrimagnetics for energy-efficient data storage devices, spintronic logic devices, and neuromorphic computers operating in the terahertz range. The found solutions will reduce the energy consumption of storage systems by two orders of magnitude (to several fJ/bit) and increase the data processing rate by three orders of magnitude, which meets the requirements for future electronic big data processing and artificial intelligence systems.

The practical value of the study
Projected research results: 

  1. The development of a generalised theory of spin-orbit torque (SOT) effect of low-dimensional ferrimagnetics describing the movement of topological textures, domain walls depending on the temperatures, the magnetic field value, and the throughput current density. The creation of a sample and the experimental measurement of SOT effects, the inter-layer Dzyaloshinskii-Moriya interaction. The spin textures will be studied to verify the developed theory.
  2. The development of theoretical models describing generators of polarised spin waves relying on ferrimagnetics with extremely low attenuation ratios.
  3. The development and production of prototypes of nano-devices based on the «heavy metal/ferrimagnetic» structure for the generation of spin waves in the sub-terahertz and terahertz range with the capability of polarisation and attenuation control.
  4. The creation of prototypes of skyrmion generators as well as the development of waveguides for their movement on the basis of ferrimagnetic materials.
  5. The enhancement of the concept of neuromorphic computations based on ferrimagnetic skyrmions operating in the sub-terahertz range and skyrmion memory and logic devices.

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