A new property of magnetism will allow you to create more powerful and colder microchips

Researchers from the Niels Bohr Institute at the University of Copenhagen have proven the existence of a magnetic

analogue of Bloch oscillations.In their work, physicists have shown that domain walls in a ferromagnetic chain with easy axes behave like quasiparticles, which oscillate under the influence of a magnetic field.

Researchers explain that magnetic materialsare not necessarily oriented uniformly: regions with north and south magnetic poles can exist side by side. These regions are called domains, and the boundary between domains is called a domain wall. Although the domain wall is not a physical object, as physicists note, it has a number of particle properties.

“It is well known that it is possible to change the situationdomain wall by applying a magnetic field. Initially, it will react like a physical object that is subject to gravity and accelerates until it hits the surface. However, other laws apply in the quantum world,” explains Professor Kim Lefmann, co-author of the study.

Scientists show that at the quantum levelquasiparticles, domain walls, behave simultaneously as objects and as waves. The wave properties mean that the acceleration slows down as the domain wall interacts with the atoms in the environment. Soon the acceleration will stop completely, and the position of the wall will begin to oscillate.”

A similar phenomenon is observed for electrons.It is called Bloch oscillations after the physicist and Nobel laureate Felix Bloch, who discovered them in 1929. As the authors of the new work note, back in 1996, Swiss theoretical physicists suggested that an analogue of Bloch oscillations could exist in magnetism. However, this hypothesis has only now been confirmed.

Scientists believe that a new property of magnetismmay be useful in the development of computers. The oscillatory properties of domain walls, according to physicists, can be used to create magnetic computers in which domain walls will replace electrons for information transmission.

The function of a computer is to transmitelectric current through the microchip. Although the amount is tiny, the current will not only carry information, but also contribute to the heat of the chip. When you have a huge amount of tightly packed components, heat becomes a problem. This is one of the reasons we hit the component compression limit. A computer based on magnetism will avoid the problem of overheating.

Kim Lefmann, professor of physics at the Niels Bohr Institute at the University of Copenhagen and co-author of the study

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