The article titled "Field-Free Spin-Orbit Torque Driven Perpendicular Magnetization Switching of Ferrimagnetic Layer Based on Noncollinear Antiferromagnetic Spin Source" discusses the efficiency of spin-orbit torque in SOT-MRAM design. The use of the non-collinear antiferromagnetic properties of Mn3Sn as a spin source is a significant development in reducing power consumption for memory chips. The unique features of Mn3Sn, including its non-collinear antiferromagnetism and Kagome spin structure, have the potential to revolutionize non-volatile memory by providing a more energy-efficient and high-performance storage solution. The article provides further details on this topic.