Non-Destructive Readout Method for 3D Magnetic Memory

Recently 3D magnetic memory using artificial ferromagnets has been proposed as a high performance memory solution. However, the existing method for reading information from this device is destructive. Here, we propose a novel nondestructive readout method for 3D magnetic memory, leveraging the magnetization dynamics induced by the spin transfer torque. We show that 16 different identifications in a 4-bit memory are possible by simply reading out the magnetization dynamics of the topmost bit layer of 3D magnetic memory with a magnetic tunnel junction. This advancement paves the way for more reliable 3D magnetic memory technologies.