Ultrafast p-bits using synthetic antiferromagnets*

Various applications ranging from cryptography to stochastic computing need random number generators (RNGs) which can be implemented in hardware using magnetic tunnel junctions (MTJs) with low barrier unstable ferromagnets (LBMs). It has been shown that with proper design such ferromagnets can show random fluctuations at GHz speeds. In this talk using stochastic LLG simulations, we will show that synthetic antiferromagnets (SAFs) built out of LBMs can fluctuate with even higher speeds. Using full SPICE simulations, we show that MTJs using SAFs can be combined with standard transistors to provide a fast tunable RNG or p-bit which can speed up numerous applications.