Unidirectional information transfer with cascaded All Spin Logic devices: A Ring Oscillator

Abstract

Magnet based logic devices have received much attention as potential alternatives [1] to charge based electronics in order to answer the ever growing concern [2] about the limits of CMOS scaling, especially since it has been shown that the energy required to turn a magnet could be as low as a few atto-joules [3]. The recently proposed All Spin Logic (ASL) device [4] is one such scheme whereby information is stored in the state of magnets and is communicated between magnets purely through spin currents, thus operating entirely within a new paradigm: using spin as a state variable.