Patent ID: 6424508
Filing Date: 2002-07-23
Classification: B82Y,G11B

Abstract:
A magnetic tunnel junction magnetoresistive head comprising:a magnetization free layer formed on a substrate, a magnetization direction of said magnetization free layer being rotatable by an external magnetic field; an insulated layer formed over said magnetization free layer; a first tunnel junction including a first magnetization pinned layer formed on a surface of said insulated layer at one end of said magnetization free layer, a magnetization direction of said first magnetization pinned layer being fixed; and said insulated layer isolating said magnetization free layer from said first magnetization pinned layer, and forming a tunnel junction between said magnetization free layer and said first magnetization pinned layer; and forming a tunnel junction between said magnetization free layer and said first magnetization pinned layer; a second tunnel junction including a second magnetization pinned layer formed on said surface of said insulated layer at another end of said magnetization free layer opposed to said one end of said magnetization free layer, a magnetization direction of said second magnetization pinned layer being fixed; and said insulated layer isolating said magnetization free layer from said second magnetization pinned layer, and forming a tunnel junction between said magnetization free layer and said second magnetization pinned layer; a first electrode electrically connected to said first magnetization pinned layer and electrically connected to said first tunnel junction; a second electrode electrically connected to said second magnetization pinned layer and electrically connected to said second tunnel junction; and a bias layer provided at both ends of said magnetization free layer, and for applying a bias magnetic field to said magnetization free layer, wherein said first and second tunnel junctions are connected in series by said magnetization free layer, and a detection current flowing from said first electrode is passed through said first and second tunnel junctions.