Modeling and simulation of nanomagnetic logic with cadence virtuoso using Verilog-A

This paper presents a novel approach to model and simulate the Nanomagnetic Logic with perpendicular magnetic anisotropy (pNML) using industry standard Cadence Virtuoso software tool. The implementation of an efficient compact model of a single nanomagnet in Verilog-A is introduced. A single magnet is the key element of Nanomagnetic logic systems. Two field coupled nanomagnets act as a magnetic inverter. Furthermore, the majority gate model is introduced. To verify the model, a circuit consisting of five such single magnets in a loop is simulated and the results are compared to an experiment on a fabricated inverter chain. To reproduce the variations in a manufacturing process the Monte Carlo simulation method is applied and the magnetization direction of the last magnet in a chain is evaluated for one hundred clocking cycles. The results are compared to the experimental data.