Patent ID: 8284526

Claim:
A tunneling junction magnetoresistive effect element, comprising: a ground layer; an antiferromagnetic layer above the ground layer; a first ferromagnetic layer above the antiferromagnetic layer and exchange-coupled to the antiferromagnetic layer; an anti-parallel coupling layer above the first ferromagnetic layer; a second ferromagnetic layer having a magnetic moment coupled anti-parallel to the magnetic moment of the first ferromagnetic layer via the anti-parallel coupling layer; an insulation barrier layer above the second ferromagnetic layer; and a third ferromagnetic layer above the insulation barrier layer, wherein at least a portion of the second ferromagnetic layer and at least a portion of the third ferromagnetic layer on an insulation barrier layer side thereof are comprised of a crystal, and wherein the insulation barrier layer comprises MgO and an oxide material having an independent cubic crystal structure and complete solid solubility with MgO.