Magnetization direction control method and application...

Details Magnetization direction control method and application... Magnetization direction control method and application...

2005-03-24

2008-08-19

Nguyen, Tuan T. (Department: 2824)

Static information storage and retrieval

Systems using particular element

Magnetoresistive

C365S173000, C365S145000

Reexamination Certificate

active

07414881

ABSTRACT:
A magnetization direction control method for controlling magnetization directions of first to third ferromagnetic layers (11-13) within a synthetic antiferromagnet structure (10A) having the first to the third ferromagnetic layers (11-13) and first and second non-magnetic layers (21, 22) interposed therebetween, without coupling antiferromagnetic material. The magnetization direction control method is composed of steps of (a) applying an external magnetic field HEto the synthetic antiferromagnet structure (10A) so as to direct the magnetizations of the first to third ferromagnetic layers in the same direction, and (b) reducing the external magnetic field to reverse the magnetization of one or some of the first to third ferromagnetic layers (11-13). The synthetic antiferromagnet structure (10A) is configured so that the magnetization of the first ferromagnetic layer (11) is reversed more easily than magnetizations of the other ferromagnetic layers in a state in which the magnetizations of the first to third ferromagnetic layers (11-13) are directed in the same direction.

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