| 摘要 |
A thin film magnetic head includes a dual spin-valve magneto-resistive element. The dual spin-valve magneto-resistive element has a dual spin-valve magneto-resistive effect multilayer film composed of a first antiferromagnetic layer, a first fixed magnetic layer being a synthetic ferrimagnetic fixed layer, a first nonmagnetic layer, a soft magnetic layer, a second nonmagnetic layer, and a second fixed magnetic layer being a synthetic ferrimagnetic fixed layer. A stacked film thickness relationship of the first fixed magnetic layer, a stacked film thickness relationship of the second fixed magnetic layer, and a magnetostrictive constant are determined, and it is configured such that a static magnetic field produced from the first fixed magnetic layer and a current magnetic field generated by a sense current act to assist magnetization of the second fixed magnetic layer. Therefore, it is possible to obtain a thin film magnetic head of which the reproduction output is large while gap narrowing and track narrowing are achieved and of which the reliability is high with enhanced stability in pinning fixation.
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