Scientists from the University of St. Petersburg and their colleagues from abroad were the first in the world to synthesize graphene and ferrimagnetic (The first 2D ferrimagnetism and graphene) to – oppose the magnetization in its sublattices. The use of the magnetic state obtained from graphene can open new avenues for electronic devices, increasing its energy efficiency and speeding up the development of devices using other technologies that do not use silicon.
Graphene, a two-dimensional variation of carbon, is the lightest and strongest of all two-dimensional materials available today, and is also highly conductive. In 2018, researchers from Saint Petersburg University, together with their colleagues from Tomsk State University and German and Spanish scientists were the first in the world to transform graphene and give it the properties of cobalt. Electrons move in graphene (The first 2D ferrimagnetism and graphene) with its own magnetic moment). When interacting with cobalt and gold, graphene not only retains its unique properties, but also takes some of the characteristics of these metals – magnetism and spin-orbit interactions.
As part of this new project, the scientists developed a system with ferrimagnetic graphene. It is a special state of matter that has magnetization and no external magnetic field. Scientists use a similar material with a thin layer of cobalt and gold alloy on top.
During surface alloying, dislocation loops formed under graphene. These loops are triangular regions with a low density of cobalt atoms that are approached by three gold atoms. Until now, it is known that single-layer graphene can only be individually magnetized. However, research by scientists from the University of Saint Petersburg has shown that it is possible to control the magnetization of individual sublattice atoms through the choice of interactions and structural defects in the substrate.
This is an important discovery because all electronic devices use electrical charges to generate heat when current flows. Our research will eventually make it possible to transfer information in the form of a pin. This is a new generation of electronic equipment, different concepts and new methods for technological development that reduce energy consumption and increase the speed of information transfer, “explained Artem Rybkin, Senior Research Director Research Associate at the Laboratory of Electronics and Spin. The Structure of Nanosystems at St. Petersburg University.
The second important part of graphene by scientists at the University of St. In this structure, the support of this relationship is explained by the presence of gold under the graphene. In some areas of magnetic and spin-orbit interactions, it is possible to go from an unusual, i.e., well-known state of graphene to a new topological state.
