Magnetic majority gate device

Abstract

The disclosed technology relates generally to spintronics, and more particularly to a magnetic majority gate device. In one aspect, a magnetic majority gate device includes a magnetic propagation layer and at least one input transducer. The magnetic propagation layer includes a plurality of magnetic buses configured to guide propagating magnetic domain walls along longitudinal directions corresponding to elongated directions of the magnetic buses. The plurality of magnetic buses includes a plurality of input magnetic buses, where each of the input magnetic buses has a corresponding input site configured to receive a corresponding input magnetic domain wall. At least one input transducer at a corresponding input site is configured to convert a digital input electrical signal into an input magnetic domain wall, such that a magnetization state of the input magnetic domain wall corresponds to a digital logic state of the digital input electrical signal. The at least one input transducer is configured to inject an in-plane electrical current into the corresponding input magnetic bus if the digital logic state is a predetermined digital logic state. The magnetic propagation layer includes a central region at which the magnetic buses converge and are joined together, such that the central region is configured for an interaction of input magnetic domain walls guided by two or more magnetic buses. The central region includes at least one magnetic constriction configured to locally restrict propagation of propagating magnetic domain walls.