Patent ID: 8716820
Filing Date: 2014-05-06
Classification: G11C,H01L

Abstract:
1. A magnetic memory, comprising: an underlying layer of a ferromagnetic body; a first nonmagnetic layer laid over the underlying layer; a data memorizing layer of a ferromagnetic body that is laid over the first nonmagnetic layer and has perpendicular magnetic anisotropy; a reference layer coupled through a second nonmagnetic layer with the data memorizing layer; and a first magnetization fixed layer and a second magnetization fixed layer that are laid underneath the underlying layer to come into contact with the underlying layer, wherein the data memorizing layer comprises: a magnetization liberalized region that has reversible magnetization, and overlaps with the reference layer; a first magnetization fixed region that is coupled with a first boundary of the magnetization liberalized region, and has a magnetization direction fixed to a first direction by effect of the first magnetization fixed layer; and a second magnetization fixed region that is coupled with a second boundary of the magnetization liberalized region, and has a magnetization direction fixed to a second direction reverse to the first direction by effect of the second magnetization fixed layer, and wherein a portion of the first nonmagnetic layer that is a portion underneath the magnetization liberalized region is thicker than a portion of the first nonmagnetic layer that is a portion underneath each of the first and second magnetization fixed regions.