Computer chips and storage elements are expected to function as quickly as possible and be energy-saving at the same time. Innovative spintronic modules are at an advantage here thanks to their high speed and efficiency, as there is no lossy electrical current, rather the electrons couple with one another magnetically -- like a series of tiny magnetic needles which interact with almost no friction loss. A team of scientists has now found promising properties with crystals grown from rare-earth atoms, which offer hope on the long path towards usage as spintronic components.