| 摘要 |
PROBLEM TO BE SOLVED: To improve head characteristics by forming side insulating layers on both sides of a layered structure including a ferromagnetic pinned layer, a tunneling barrier layer and a non-magnetic metal protect layer, cleaning a surface of the non-magnetic metal protect layer, and forming a ferromagnetic free layer facing the ferromagnetic pinned layer via the cleaned surface. SOLUTION: A pinned layer 50, a ferromagnetic pinned layer 40, a tunneling barrier layer 30, and a non-magnetic metal protect layer 7 are sequentially formed in a layered structure, and side insulating layers 93, 93 are formed on both sides of the layered structure, respectively. A surface of the non- magnetic metal protect layer 7 is cleaned, and a ferromagnetic free layer 20 is so formed as to face the ferromagnetic pinned layer 40 via the cleaned surface. Bias applying means 61, 61 are respectively formed at a constant space D from opposite ends of the ferromagnetic free layer 20 in the longitudinal direction thereof. The constant space D is preferably in the range from 0.02μm to 0.15μm.
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