Patent ID: 7016170
Filing Date: 2006-03-21
Classification: B82Y,G11B,H01F

Abstract:
1. A magnetic head comprising: an antiferromagnetic layer; a pinned ferromagnetic layer adjacent to the said antiferromagnetic layer, wherein said pinned layer is magnetically pinned by a magnetization of said antiferromagnetic layer; a free ferromagnetic layer; a stack of ferromagnetic layers comprises plural ferromagnetic layers and at least one antiferromagnetic coupling layer which is sandwiched by said plural ferromagnetic layers; a pair of electrodes to apply current to these layers, wherein said stack of ferromagnetic layers is formed between said pair of electrodes, a first magnetic pole piece and a second magnetic pole piece, and a coil layer formed between said first magnetic pole piece and said second magnetic pole piece, wherein said free ferromagnetic layer has a magnetic domain direction which is controlled by said stack of ferromagnetic layers, and wherein a magnetic field direction of said stack of ferromagnetic layers is almost parallel to said magnetic domain direction of said free ferromagnetic layer.