New class of efficient magneto-optical memories uses tiny magnets to store data and control light propagation

https://www.eurekalert.org/news-releases/1070626

"manipulate magneto-optical cerium-substituted yttrium iron garnet optical properties within the material... 100X faster switching speeds, consume about one-tenth the power, reprogrammable >2.3 billion times for different tasks... matrix-vector multiplication, which lies at the core of any neural network”