- These skyrmions can now be moved by electrical currents at speeds of up to 900 m/s in specially crafted multilayer magnetic structures, a significant leap from the previously observed values of around 100 m/s in conventional single layer ferromagnetic thin films
- These results, published in Science on 18th of April 2024, pave the way for developing higher-performance and less energy-intensive computing devices
- As researchers continue to explore and refine this technology, the potential applications and benefits are vast, heralding a new era in computing and information technology
NE SCIENCE & TECHNOLOGY BUREAU
GANDHINAGAR, JUNE 25
An international team of researchers with collaborating institutes from France, India, Italy and Spain has made a groundbreaking discovery in the field of magnetic nanobubbles, known as skyrmions. These skyrmions can now be moved by electrical currents at speeds of up to 900 m/s in specially crafted multilayer magnetic structures, a significant leap from the previously observed values of around 100 m/s in conventional single layer ferromagnetic thin films. This advancement holds immense potential for the future of computing, offering new avenues for information processing in electronic devices.
Anticipated as future bits in computer memory, these nanobubbles offer enhanced computing and information storage capacity due to their tiny size, as well as low energy consumption. The breakthrough came from using a synthetic antiferromagnetic multilayer structure as the medium, allowing the skyrmions to move 10 times faster than previously observed.
These results, published in Science on 18th of April 2024, pave the way for developing higher-performance and less energy-intensive computing devices. Prof. Naveen Sisodia from the Department of Physics at IIT Gandhinagar is a proud co-author of this study. He was instrumental in the simulation process, utilizing the PARAM ANANTA supercomputing facility at IIT Gandhinagar.
“The potential that these skyrmions hold is immense. With applications ranging from data storage to in-memory computing, technologies based on skyrmions can bring about a significant paradigm shift in the way we represent and store data” says Prof. Sisodia who is now working on uncovering the mechanism of skyrmion motion in magnetic thin films with defects. “By demonstrating high-speed skyrmion motion at ultralow current densities, this work represents a crucial advancement for all skyrmion-based technologies”, adds Prof. Sisodia.
This remarkable breakthrough not only demonstrates the potential of skyrmions as highly efficient bits in computer memory but also underscores their usefulness in advancing artificial intelligence technologies. The work emphasizes the dual benefits of enhanced computing performance and reduced energy consumption, highlighting the revolutionary impact of this research on future technologies.
Magnetic skyrmions are topological magnetic textures that hold great promise as nanoscale bits of information in memory and logic devices. Although room-temperature ferromagnetic skyrmions and their current-induced manipulation have been demonstrated, their velocity has been limited to about 100 m/s. Additionally, their dynamics are perturbed by the skyrmion Hall effect, a motion transverse to the current direction caused by the skyrmion’s topological charge.
In this study, skyrmions in compensated synthetic antiferromagnets were shown to move by current along the current direction at velocities of up to 900 m/s. This is explained by the cancellation of the net topological charge, leading to a vanishing skyrmion Hall effect. The results open an important path toward the realization of logic and memory devices based on the fast manipulation of skyrmions in tracks.
The success of this research opens exciting prospects for the tech industry. The enhanced movement of skyrmions can lead to faster and more efficient data processing, benefiting not only traditional computing devices but also emerging technologies in artificial intelligence and other advanced fields. As researchers continue to explore and refine this technology, the potential applications and benefits are vast, heralding a new era in computing and information technology.
Prof. Naveen Sisodia can be contacted over mail at naveen.sisodia@iitgn.ac.in
