A technology-agnostic MTJ SPICE model with user-defined dimensions for STT-MRAM scalability studies

Abstract

The development of a scalable and user-friendly SPICE model is a key aspect of exploring the potential of spin-transfer torque MRAM (STT-MRAM). A self-contained magnetic tunnel junction (MTJ) SPICE model is proposed in this work which can reproduce realistic MTJ characteristics based on user-defined input parameters such as the free layer's length, width, and thickness. Using the propose model, scalability studies of both in-plane and perpendicular MTJs can be performed across different technology nodes with minimal effort, which differentiates this model from most previously reported models.