ABSTRACT
MnGa .............................297 13.5 Point Contact Andreev Reflection Determination of
Spin Polarization .........................................................................................299 13.6 Co
TiSn and Co
CrAl Heusler Alloys for Spintronic Devices ..................301 13.7 Summary and Outlook ................................................................................302 References..............................................................................................................303
Spintronics unifies a range of metallic and semiconducting devices where operation is dependent upon a spin imbalance in the structure of the semiconductor. The technology of spintronics can be applied to nanostructures for low-temperature operation of a quantum qubit in a prototype quantum computer and also for devices envisaged operating at or close to 300 K, particularly the spin-polarized lightemitting diode (spin LED). The spin LED can be used to produce photons with a predetermined polarization and such structures could form part of a quantum communication network. The spin imbalance in the semiconductor device can then be manipulated with magnetic fields, electric fields, Landé spin
