A computing architecture composed of field‐coupled single domain nanomagnets clocked by magnetic field

SUMMARY Next neighboureld coupling of nanodevices is emerging as an alternative way to integrate nano- electronic devices (Nanotechnology 1993; 4:49). In this paper, integrated circuits composed of single domain nanomagnets are proposed. New magneticeld-coupled devices with multiple equilibrium states are introduced. The devices are made locally active by exposing them to external magneticelds. Non- reciprocity is achieved by proper design of the nanomagnet's shape together with its clocking. We demonstrate that (i) digital signal can propagate along a line of coupled single domain nano- magnets; (ii) and a family of logic circuits (inverter, majority gate, etc.) can be realized. Based on these observations we envision a new nanoelectronic computing architecture as a two-dimensional ar- ray ofeld-coupled nanomagnets. We estimate an integration density of 10 10 device=cm 2 , few hundred MHz operation speed, straightforward fabrication technology and robust operation in a wide temperature range. Copyright ? 2003 John Wiley & Sons, Ltd.