Researchers discover new material for optically-controlled magnetic memory

https://phys.org/news/2024-08-material-optically-magnetic-memory.html

"fast, energy-efficient... alloy of manganese, bismuth, tellurium magnetic properties changed quickly/ easily in response to light, enabling laser encoded information within its magnetic states... its electrons compete between 2 opposing states: topological state useful for encoding quantum information/ light-sensitive quasi-2D electronic state with tight coupling between magnetism and external photons of light, useful for optical storage with orders magnitude more efficiency than current storage (future: quantum data storage"