Sub-10-nm Inter-magnet Spacing for Improved Defect Tolerance in NML
Nanomagnet logic (NML) is a beyond-Moore paradigm in which nanoscale magnetic islands (arranged in a QCA-like architecture) perform Boolean logic operations. Despite recent successes in complex and low-power logic operations, NML suffers from error rates, caused by thermal noise and process variations, that are much higher than those for CMOS-based circuits. Shape variations in individual magnets can introduce unwanted bias. In addition, edge roughness in magnets can cause premature switching. Stronger coupling between the magnets can mitigate these unwanted effects. To this end, inter-magnet spacing can be a useful parameter with which the coupling can be tuned to the desired strength.