NDLI: Effect of island geometry on the replay signal in patterned media storage

Content Provider	IEEE Xplore Digital Library
Author	Nutter, P.W. McKirdy, D.Mc.A. Middleton, B.K. Wilton, D.T. Shute, H.A.
Copyright Year	1965
Abstract	In a move to extend the storage capabilities of magnetic storage systems beyond 1 Tb/in/sup 2/, the use of patterned media has often been cited. Here, recorded domains are constrained by the geometry of the magnetic island and not the geometry of the recording head. Conventional two-dimensional readout modeling techniques, using the reciprocity integral, rely on the assumption that the across-track medium magnetization is uniform under the giant magnetoresistive replay head. However, in the case of a geometrically constrained medium this is not the case. This work investigates the effect that the island geometry has on the characteristics of the replay signal in perpendicular patterned magnetic media storage through the extension of the reciprocity integral to three dimensions. The paper describes replay pulses that offer different characteristics from those obtained by conventional two-dimensional techniques. The origins of these differences are explained by the variation in medium magnetization across the track.
Sponsorship	IEEE Magnetics Society
Starting Page	3551
Ending Page	3558
Page Count	8
File Size	370831
File Format	PDF
ISSN	00189464
Volume Number	40
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Geometry Perpendicular magnetic recording Magnetic domains Signal to noise ratio Magnetization Magnetic noise Couplings Noise reduction Grain size Magnetic analysis reciprocity Magnetic recording patterned media perpendicular magnetization
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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