Fig. 4: Two-dimensional MTJ-based MCA architecture and benchmarking against CMOS.
From: Domain wall motion-driven magnetic convolutional accelerator
a Schematic of the 2D MTJ-based MCA (MTJ-MCA). (i) Conceptual design using crossing arrays of MTJs. Gray arrows indicate domain-shifting currents; yellow arrows denote vertical readout through the MTJs. (ii) Schematic of a single MTJ junction. (iii) Top view of an MTJ junction and overlapping magnetic strips. Red and blue regions represent –z and +z magnetizations, with domain lengths \({{L}}_{D,Y}\) and \({{L}}_{D,X}\) along the y- and x-directed strips and junction width \(W\). Overlap regions highlight different domain combinations. b Benchmarking comparison between the 1D Hall-based MCA, the 2D MTJ-MCA, and CMOS (28 nm). The plot uses a logarithmic scale. The figure of merit is defined as \({{{\rm{FOM}}}}=T/({AE})\).
