NDLI: Medium SNR and Sharpness of Micro-Track Profile of CPP-Type Head With an Arbitrary Magnetic Shield Shape

Content Provider	IEEE Xplore Digital Library
Author	Hatatani, M. Suzuki, Y. Miyamoto, N.
Copyright Year	1965
Abstract	Current perpendicular to plane (CPP)-type heads having various magnetic shield shapes were fabricated, and their medium signal-to-noise ratios (SNRs) and micro-track profiles (MTPs) were measured. To find out how to improve the sharpness of an MTP, we calculated the relationship between a magnetic read width (MRW) and a magnetic shield shape and a shield-to-shield gap spacing (Gs). In our calculation based on the reciprocity principle, a nonuniform magnetic potential reflecting the sensitivity in the free layer was introduced to give a precise MTP. The calculation indicates that a narrow Gs and a parallel shield are effective in obtaining a sharper MTP. The calculation results were also confirmed by experimental data. Measurement using a perpendicular medium shows that the medium SNR gets higher as the MTP becomes sharper. Thus, CPP-type heads with a sharp MTP have an advantage in getting good SNR performance
Sponsorship	IEEE Magnetics Society
Starting Page	2202
Ending Page	2204
Page Count	3
File Size	259036
File Format	PDF
ISSN	00189464
Volume Number	43
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic heads Magnetic shielding Perpendicular magnetic recording Signal to noise ratio Magnetic flux Magnetic sensors Giant magnetoresistance Tunneling magnetoresistance Shape measurement Magnetic noise transition noise CPP-head magnetic track width medium SNR micro-track profile parallel shield
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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