Magnetic thin film having non-magnetic spacer layer that is...

Details Magnetic thin film having non-magnetic spacer layer that is... Magnetic thin film having non-magnetic spacer layer that is...

2007-02-20

2010-12-28

Evans, Jefferson (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

07859798

ABSTRACT:
A magnetic thin film has: a pinned layer whose magnetization direction is fixed with respect to an external magnetic field; a free layer whose magnetization direction is changed in accordance with the external magnetic field; and a non-magnetic spacer layer that is sandwiched between said the pinned layer and the free layer, wherein sense current is configured to flow in a direction that is perpendicular to film surfaces of the pinned layer, the non-magnetic spacer layer, and the free layer. The non-magnetic spacer layer has a first layer which includes SnO2, and a pair of second layers which are provided to sandwich the first layer, the second layers being made of a material which exhibits a higher corrosion potential than Sn.

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Office Action issued by the Japanese Patent Office on Sep. 21, 2010 for the Japanese counterpart patent application No. 2008-001197.

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