Libor Šmejkal, inspired by M. C. Escher’s artwork, predicted the existence of a new kind of magnetism called “altermagnets.” These magnets could revolutionize technology by offering faster, more energy-efficient devices.
The discovery of altermagnets challenges the long-held belief that there are only two types of magnetism: ferromagnetism and antiferromagnetism. Altermagnets exhibit unique quantum properties that combine the advantages of both known types of magnets.
Understanding magnetism involves examining the spins of electrons in atoms. When unpaired electrons have magnetic moments, they create a magnetic field. Ferromagnets have aligned magnetic moments, while antiferromagnets have alternating directions of magnetic arrows.
Šmejkal’s breakthrough in 2022 led to the confirmation of altermagnets in 2024, with manganese telluride being identified as a potential altermagnetic material. Researchers are now exploring ways to create practical altermagnets for use in innovative technologies.
One exciting application of altermagnets is in spintronics, a technology that utilizes the spin of electrons to store information. Altermagnets could overcome limitations in current spintronic devices by offering spin-splitting effects without the need for ferromagnetic materials.
Researchers are actively working on developing new altermagnetic materials by applying strain or stacking layers of different materials. The goal is to create scalable altermagnets that can be used in future spintronic devices.
With the potential for at least 200 candidate materials to exhibit altermagnetism, the future looks promising for the commercial viability of these innovative magnets. Additionally, Šmejkal’s latest prediction of antialtermagnetism hints at even more complex magnetic phenomena waiting to be explored.
Just as magnets captivate with their intricate properties, the realm of magnetism continues to unveil new surprises, promising a future of advanced technologies powered by these fascinating quantum phenomena.
