An electron spin-based memory cell has a first ferromagnetic layer with a
changeable magnetization state and a second ferromagnetic layer with a
fixed magnetization state. A non-volatile logic state of such cell is
dependent on a relationship between said first ferromagnetic layer and
said second ferromagnetic layer, including whether said changeable
magnetization state and said fixed magnetization state are parallel or
antiparallel. To facilitate writing, the cell is adapted carry at least a
portion of a write pulse.