Ultrafast, low-heat magnetic switch could redefine AI hardware
Researchers at the University of Tokyo unveiled a spintronic switch made from Mn3Sn antiferromagnet that can flip a binary state in about 40 picoseconds—up to 1,000× faster than the fastest AI accelerators and with far less heat and energy—offering a path to cooler, more efficient future hardware, though overall computing speed also depends on non-switching components and commercialization challenges.