Patent ID: 9202544
Filing Date: 2015-12-01
Classification: G01R,G11C

Abstract:
1. A device for storing data in a data cell formed of a plurality of ferromagnetic films, comprising: a plurality of ferromagnetic films, including first and second films, having perpendicular magnetic anisotropy, which can develop extraordinary Hall resistence, each film having terminals arranged such that when a bias current is passed through a first pair of the terminals of the film, a voltage between a second pair of the terminals depends on the extraordinary Hall resistence developed in the film; one or more electrical conductors connecting a first terminal the first film to a first terminal of the second film, to form a bias current path between a second terminal of the first film and a second terminal of the second film, through the plurality of films and the one or more electrical conductors; a current source for connecting to the second terminals of the first and second films, and configured to inject currents through the bias current path, so as to generate extraordinary Hall voltages in the plurality of ferromagnetic films; and a sensing circuit, which is configured to measure a voltage between a terminal of the first film and a terminal of the second film, and to determine from the measured voltage a data value stored in the data cell formed of the plurality of films.