Magnetoresistive element, thin-film magnetic head, head...

Details Magnetoresistive element, thin-film magnetic head, head... Magnetoresistive element, thin-film magnetic head, head...

2004-12-03

2008-11-04

Miller, Brian E (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

07446983

ABSTRACT:
An MR element comprises: a nonmagnetic conductive layer having two surfaces facing toward opposite directions; a free layer disposed adjacent to one of the surfaces of the nonmagnetic conductive layer, wherein the direction of magnetization in the free layer changes in response to an external magnetic field; and a pinned layer disposed adjacent to the other of the surfaces of the nonmagnetic conductive layer, wherein the direction of magnetization in the pinned layer is fixed. The pinned layer incorporates a first pinned layer, a coupling layer and a second pinned layer. The second pinned layer incorporates first to third magnetic layers each of which is made of a magnetic material. Layered structures each made up of a Cu film, a magnetic film and a Cu film are inserted between the first magnetic layer and the second magnetic layer, and between the second magnetic layer and the third magnetic layer, respectively.

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