Variability of electronics and spintronics nanoscale devices

We address the problem of how the quantum (and the temperature) fluctuations will affect the magnetoelectronic circuits' operation, and if there are any advantages, or possibly drawbacks, in the switching from the charge for uncorrelated electronics to the spin for spintronics. Within the framework of minimal ferromagnetic Hamiltonian, we consider the fluctuations in the total number of the electrons on the gate, the total spin, and the spin vector projection on the easy axis. It is expected that spintronics devices will improve variability compared with today's electronics devices. (c) 2008 American Institute of Physics.