Science, Space and Technology News 2024
Antiferromagnetic skyrmions moved in a magnetic racetrack by an electrical current. Credit: © Bruno Bourgeois and Olivier Boulle
Scientists discovered that skyrmions, potential future bits for computer memory, can now move at speeds up to 900 m/s, a significant increase facilitated by the use of antiferromagnetic materials.Anticipated as future bits in computer memory, these nanobubbles offer enhanced avenues for information processing in electronic devices. Their tiny sizeUntil now, these nanobubbles moved no faster than 100 m/s, which is too slow for computing applications.
A skyrmion consists of elementary nanomagnets that wind to form a highly stable spiral structure, like a tight knot.Antiferromagnetic stacks consist of two nano-sized ferromagnetic layers separated by a think non-magnetic layer, with opposite magnetisation.Reference: “Fast current-induced skyrmion motion in synthetic antiferromagnets” by Van Tuong Pham, Naveen Sisodia, Ilaria Di Manici, Joseba Urrestarazu-Larrañaga, Kaushik Bairagi, Johan Pelloux-Prayer, Rodrigo Guedas, Liliana D.
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