US researchers unlocks atomic magnetism, advancing spintronics for faster, smaller, energy-efficient AI-ready electronics.
Scientists at Argonne National Laboratory are advancing next-generation electronics by unlocking the behavior of magnetism at the atomic scale. Their latest research focuses on spintronics, a technology that uses electron spin instead of charge to process and store data more efficiently.
By studying ultrathin van der Waals magnets, the team has revealed how nanoscale magnetic domains form and evolve, offering new control over information states. The breakthrough paves the way for faster, smaller, and energy-efficient devices, addressing the growing demands of AI and data-intensive computing. Nanoscale spin controlRising data demands are pushing conventional electronics to their limits, driving interest in spintronics, which uses electron spin instead of charge for faster, low-energy data processing and storage. Electron spin generates tiny magnetic fields that encode information at extremely small scales, making precise nanoscale control essential for next-generation devices.According to researchers, ultrathin van der Waals magnets, which can be reduced to just a few atomic layers, have emerged as promising materials for such applications. These materials provide a platform for precisely manipulating magnetic states required for next-generation electronics.Recent research at ANL has revealed how magnetic domains behave within these two-dimensional materials. The study shows that variations in thickness significantly influence how domains form, evolve, and respond to external magnetic fields. According to the team, understanding these effects is key to predicting material behavior and designing faster, smaller, and more efficient spin-based electronic devices.The ANL team investigated the phenomenon using Fe₃GeTe₂, a van der Waals ferromagnet with strong spintronic potential. The material was cooled to about −173°C using liquid nitrogen to retain magnetism. By applying a magnetic field during cooling, scientists created controlled magnetic patterns, enabling the formation and manipulation of distinct domain states on demand.Low power computingEach observed domain pattern revealed how electron spins organize at the nanoscale, offering insights that were previously inferred only from overall magnetization. To study these effects directly, researchers used cryogenic Lorentz Transmission Electron Microscopy, a technique that images magnetic structures in ultrathin materials at extremely low temperatures. Experiments conducted at the ANL’s Center for Nanoscale Materials enabled real-time tracking of magnetic behavior within a single Fe₃GeTe₂ flake during magnetization reversal.The study showed that material thickness and applied magnetic fields strongly influence the size, density, and evolution of skyrmions—tiny, stable magnetic whirlpools formed by twisting electron spins. These structures require minimal energy to move, making them promising for high-density, energy-efficient data technologies. Understanding how to control their formation is essential for scaling them down to match modern electronic components.Complementary micromagnetic simulations accurately reproduced the observed behavior, aligning closely with experimental results. Overall, the team claims the findings provide a predictive framework for tailoring magnetic domain structures, advancing the development of next-generation spintronic devices.“If engineers can reliably tune skyrmion size and density, they can begin building the kinds of spintronic technologies that have long been imagined. Those with ultra‑dense memory, low‑power processors, and magnetic storage far beyond the capabilities of today’s hard drives,” said Charudatta Phatak, interim director and group leader in ANL’s Materials Science division and a study co-author, in a statement.
ANL Argonne National Laboratory Electron Electron Spin Ferromagnet Magnetism Next-Generation Devices Spintronics Van Der Waals Magnets
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