Tiny magnetic structures known as skyrmions could eventually enable computers that process information in ways inspired by the human brain while using far less energy. New research has provided a closer look at how these microscopic magnetic vortices behave, including the first real-time imaging of a magnetic skyrmion lattice as it melts while individual skyrmions are manipulated.
Published in Nature Nanotechnology, the research could help scientists develop smaller, more energy-efficient computing systems and advance work in quantum technologies. Most of the study was conducted at the Institute of Physics at Johannes Gutenberg University Mainz in Germany, in collaboration with professors at the Norwegian University of Science and Technology (NTNU).
“Skyrmions are tiny magnetic vortices that can store information in a completely new way,” explains Asle Sudbø, who heads NTNU’s Center for Quantum Spintronics (QuSpin).
Unlike conventional technologies, which generally require more space and energy as the amount of processed data increases, skyrmions could offer a more efficient alternative.
“Instead of current technologies, which always require more space and energy to process data, skyrmions could enable the construction of much smaller and more energy-efficient data storage systems,” Sudbø said.
Tiny magnetic vortices could enable brain-like computers
The potential applications of skyrmions extend beyond data storage. They are also important to spintronics, a field that aims to use the magnetic properties of electrons in electronic devices, as well as to research into topological quantum effects.
One particularly promising possibility is the development of computers that operate in ways similar to biological brains.
“These nanoscale vortices could help us develop computers that resemble biological brains,” Sudbø said.
Instead of relying solely on conventional transistor-based computing, such systems could use magnetism to process information. In principle, this approach could reduce power consumption substantially and allow future computers to perform complex tasks using significantly less energy.
Turning that potential into practical technology will require scientists to understand precisely how skyrmions behave and how to manipulate them reliably. The latest research represents progress toward that goal.
Scientists observe a melting magnetic skyrmion lattice
Skyrmions do not always occur as isolated magnetic structures. Under certain conditions, they form repeating patterns called lattices. These arrangements resemble the regular organization of atoms in a crystal, but occur on a much smaller scale.
Scientists can manipulate these patterns, a capability that could be essential if skyrmions are incorporated into future computing devices.
In the new study, researchers recorded a magnetic skyrmion lattice melting while simultaneously controlling individual skyrmions. The process had not previously been demonstrated in this way.
“For the first time, researchers have been able to image in real time how a magnetic skyrmion lattice melts, and at the same time be able to directly manipulate individual skyrmions while they are being imaged. For example, both their shape and size can be changed ‘on the fly,’” Sudbø said.
Directly observing the process gives researchers a clearer view of how an organized skyrmion structure responds as it breaks down. It also allows them to study how changing the size and shape of individual magnetic vortices affects their behavior.
A step toward energy-efficient computing
Understanding what happens as a skyrmion lattice is destroyed could help scientists develop more precise methods for controlling these structures. Such control will be particularly important if skyrmions become components of future computer systems.
The finding therefore offers more than a new way to observe unusual magnetic phenomena. It provides information that could help researchers address challenges involved in developing practical skyrmion-based technologies.
“This discovery gives us new insights into how this type of particle behaves, so this could be important for the development of more energy-efficient computer technologies in the future,” Sudbø said.
Skyrmions still require significant development before they can be used in everyday computing devices. However, the study highlights their potential to improve data storage, enable new computing architectures and support advances in quantum technology.
By learning to observe and manipulate these tiny magnetic vortices in real time, scientists are developing capabilities that may eventually help reshape computer design.
“This has the potential to revolutionize the way we think about computers,” Sudbø concluded.
Source: www.sciencedaily.com
