Domain stabilized magneto-optic head

Details Domain stabilized magneto-optic head Domain stabilized magneto-optic head

2007-01-23

2007-01-23

Renner, Craig A. (Department: 2627)

Dynamic optical information storage or retrieval

Dynamic mechanism optical subsystem

C360S114010, C369S013020

Reexamination Certificate

active

10652278

ABSTRACT:
A magneto-optic head includes a magnetic layer formed to have a substantially stabilized magnetic domain configuration. The magnetic layer includes a set of magnetic domains that includes one or more magnetic domains that are oriented such that they are substantially parallel to a major axis of the magnetic layer. In exemplary embodiments, the magnetic layer is deposited over a non-magnetic substrate and patterned, e.g., etched, in such a way that ordered magnetic domains form within the magnetic layer. For example, the magnetic layer may be patterned to have a height and width-to-height aspect ratio that yields one or more magnetic domains that are oriented such that they are substantially parallel to a major axis of the magnetic layer. In some embodiments, two magnetic layers are antiferromagnetically exchange coupled such that each magnetic layer includes a magnetic domain that is oriented substantially parallel to the major axis of that magnetic layer.

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Maillot et al., “High track density magneto-optical readout of magnetic tapes,”IEEE Transactions on Magnetics, vol. 30, No. 2, Mar. 1994, pp. 326-330.

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