Patent ID: 8593862
Filing Date: 2013-11-26
Classification: B82Y,G11C,H01L

Abstract:
1. A spin-torque transfer memory random access memory (STTMRAM) element comprising: a fixed layer having a first magnetization that is substantially fixed in one direction and formed on top of a substrate; a tunnel layer formed upon the fixed layer; and a composite free layer having a second magnetization that is switchable in two directions and formed upon the tunnel layer and made of an iron platinum alloy including at least one of X material and at least one of Y material, wherein X comprises: phosphorous (P), and nitrogen (N) and Y comprises: silicon (Si), aluminum (Al), tin (Sn), lead (Pb), antimony (Sb), and bismuth (Bi), the magnetization direction of each of the composite free layer and fixed layer being substantially perpendicular to the plane of the substrate, wherein during a write operation, a bidirectional electric current is applied across the STTMRAM element to switch the second magnetization between parallel and anti-parallel states relative to the first magnetization.