Patent ID: 7825486
Filing Date: 2010-11-02
Classification: G11C,H01L

Abstract:
1. A non-volatile memory cell, comprising: a first ferromagnetic layer having a defined magnetization direction; a second ferromagnetic layer having a magnetization direction; a non-magnetic spacer layer between the first ferromagnetic layer and the second ferromagnetic layer; a third ferromagnetic layer having a defined magnetization direction; and a resistance switching material between the second ferromagnetic layer and the third ferromagnetic layer; wherein the relative orientation of the magnetization directions of the first and second ferromagnetic layers define a value of stored information; and wherein the resistance switching material has a charge carrier density that is reversibly switchable between different carrier density states by an applied electrical voltage signal and the different carrier density states cause different effective magnetic exchange couplings between the second ferromagnetic layer and the third ferromagnetic layer, thereby cause different magnetization directions of the second ferromagnetic layer.