Compact modeling of a magnetic tunnel junction using VHDL-AMS: computer aided design of a two-axis magnetometer

Currently, the lack of compact magnetic tunnel junction (MTJ) model is a truly limiting factor for the design of spintronics circuits. In this paper, we present a compact MTJ model written in VHDL-AMS. This behavioral model is based on the Stoner-Wohlfarth model and takes most of the important phenomena such as magnetic coupling, capacitance, and magnetization dependent conductance into account. The method employed to model a two layer magnetic tunnel junction is detailed. Applications of this model such as the simulation of the operation of a magnetometer is also presented.