“Spintronics” holds promise for new types of devices for information processing and data storage, with ones and zeros being stored in the spin state of electrons as well as their electric charge. Such devices could be faster and more energy efficient than current electronics.
Dilute magnetic semiconductors such as manganese-doped gallium arsenide are a promising material for spintronics, said Slavomir Nemsak, staff researcher at the Lawrence Berkeley National Laboratory and former postdoc in the UC Davis Department of Physics, working with Professor Charles Fadley and Adjunct Professor Claus Schneider. They have ferromagnetic properties but are not themselves metals. They are called “dilute” because the dopant makes up a small amount (a few percent) of the semiconductor material.