Tailoring Interface-Induced Chirality in Synthetic Antiferromagnets for Next-Generation Spintronics through Strategic Heavy Metal Layer Optimization

Abstract

This study explores the possibility of designing induced chirality at the interfaces in the synthetic antiferromagnetics (SAFs) throughout enhancing the heavy metal layer in the multilayer structures based on these materials for the applications of the next generation spintronics. This study considers the spin-orbit interaction (SOI) and Dzyaloshinskii-Moriya Interaction (DMI) to achieve control of spin current flow direction and spinal structures such as skyrmions. Results showed that platinum can produce higher DMI energy density of 1.3 mJ/m² at layer thickness of 35 μm when compared to tantalum and tungsten. The optimized model of the multilayer structure showed velocities up to 10³ m/s at low threshold current density of 1.2x10¹¹ A/m² with superiority over the standard model. These models allow the development of ultrafast and low-energy magnetic random-access memories (MRAM) for neural computers and new generations of effective spintronics.