Physicists create the first two-dimensional ferrimagnetism in graphene

The world's first two-dimensional ferromagnetism has been created by scientists from St. The obtained magnetic state of Graphene can be used as a basis for a new approach to electronics, increasing its energy efficiency and speed.

Graphene, a two-dimensional modification of carbon, is the lightest and strongest of all two-dimensional materials. Researchers from St. Petersburg University, together with their colleagues from Tomsk State University and German and Spanish scientists, were the first in the world to modify graphene and give it the properties of gold and nickel. Graphene takes on the properties of the metals when interacting with them.

Scientists created a system with a ferrimagnetic state of Graphene. It is a state in which there is no magnetic field. The physicists used a thin layer of gold and a thin layer of cobalt to make a similar device.

The dislocation loops were formed under Graphene. The gold atoms have moved closer to the triangular regions of the loops. It was known that single-layer Graphene could only be fully magnetized in a uniform manner. The scientists from St. Petersburg University have shown that it is possible to control the magnetization of the atoms of individual sublattices.

This is a significant discovery as all electronic devices use electrical charges. Spin currents will eventually be used to transmit information. This is a new generation of electronics, a fundamentally different logic and a new approach to technology development that increases the speed of information transfer.

The strong spin-orbit interaction is one of the main characteristics of the Graphene. The interaction is strengthened by the presence of gold atoms under Graphene. It is possible to move from a familiar state of Graphene to a novel one.

The results of the research are published in a journal.

Artem G.Rybkin and his colleagues wrote about Sublattice Ferrimagnetism in Quasifreestanding Graphene. There is a book titled "PhysRevLett.129.226401."

Journal information: Physical Review Letters

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