Magnetic sensing element having specular layer

Details Magnetic sensing element having specular layer Magnetic sensing element having specular layer

2005-06-07

2005-06-07

Evans, Jefferson (Department: 2652)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

C360S324100

Reexamination Certificate

active

06903907

ABSTRACT:
A specular layer and a nonmagnetic layer are provided on a central portion of a free magnetic layer, and ferromagnetic layers and second antiferromagnetic layers are provided on both end portions of the free magnetic layer. In the present invention, the total thickness of the specular layer and the nonmagnetic layer can be decreased, and thus ion milling for removing the layers from both end portions of the free magnetic layer can be performed with low energy. Therefore, both end portions of the free magnetic layer are less damaged by ion milling, and ferromagnetic coupling produced between both end portions of the free magnetic layer and the ferromagnetic layers can be increased, thereby permitting appropriate control of magnetization of the free magnetic layer.

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