NMLSim 2.0: A robust CAD and simulation tool for in-plane Nanomagnetic Logic based on the LLG equation

Abstract

Nanomagnetic Logic (NML) is a new technology based on the magnetization of nanometric magnets. Logic operations are performed via dipolar coupling through ferromagnetic and antiferromagnetic interactions. The low energy dissipation and the possibility of higher integration density in circuits are significant advantages over CMOS technology. Even so, there is a great need for simulation and CAD tools for the proper study of large NML circuits. This paper presents a high-efficiency tool that uses the Landau-Lifshitz-Gilbert equation to evolve the magnetization of the particles over time in a monodomain approach. The new version of NMLSim comes with flexibility in its code, allowing expansion of the tool with ease and consistency. The results of simulated structures show the reliability of the simulator when compared with the current state of the art Object-Oriented Micromagnetic Framework (OOMMF). It also presents an improvement of up to 716 times in execution time and up to 41 times in memory usage.