It is the breakthrough that physicists and chemists around the world have long anticipated and it will play a pivotal role in information technology in coming years. Researchers have managed, for the first time, to directly observe the 100 percent spin polarization of a Heusler compound. Heusler alloys are composed of several metallic elements arranged in a lattice structure. They are among those materials that potentially can be used for ever smaller data storage components with ever greater storage capacity.