Patent ID: 7884403

Claim:
A magnetoresistive device having a tunnel barrier junction structure, the magnetoresistive device comprising: a tunnel barrier layer; a first ferromagnetic material layer of a BCC structure formed on a first side of said tunnel barrier layer; and a second ferromagnetic material layer of the BCC structure formed on a second side of said tunnel barrier layer, wherein said tunnel barrier layer is formed by a single-crystalline MgOx (001) (0<x<1) or a poly-crystalline MgOx (0<x<1) in which (001) crystal plane is preferentially oriented, and wherein a tunnel barrier height between a bottom of a conduction band of said tunnel barrier layer and a Fermi energy of at least one of said first and second ferromagnetic layers is a discontinuous value in a range of 0.2 to 0.5 eV.