Patent ID: 7684147
Filing Date: 2010-03-23
Classification: B82Y,G01R,G11C,H01F,H01L

Abstract:
1. A magnetic bit cell for use in a planar Hall effect magnetoresistive random access memory (MRAM) device, the magnetic bit cell comprising: an active area comprising a magnetic film that exhibits both planar Hall effect and biaxial magnetic anisotropy; a first pair of conductive leads arranged on opposing sides of the active area for driving electrical current across the active area in a first direction; and a second pair of conductive leads arranged on opposing sides of the active area in a second direction perpendicular to the first direction for measuring voltage across the active area in the second direction; wherein the magnetic film is epitaxially grown on a perovskite single crystal so that easy axes of the thin film are perpendicular to each other and at a 45-degree angle relative to the direction of the current.