NDLI: Estimation of submicron read-width in longitudinal magnetic recording

Content Provider	IEEE Xplore Digital Library
Author	Prabhakar, A. Sankar, S.
Copyright Year	1965
Abstract	Low signal-to-noise ratios at submicron read-widths is a limiting factor in measurements of the magnetic read-width from a single microtrack. Instead, a number of adjacent microtracks, of decreasing widths were used to generate a series of microtrack profiles. There was a quadratic dependence of the full-width at half-maximum of the cross-track profile on the microtrack width. This result was also proved analytically for profiles with a Gaussian and Lorentzian shapes. The asymptotic limit of the quadratic fit yielded the magnetic width of the reader. A further improvement in the characterization method was possible by assuming that the microtracks had sharp edges. With a rectangular profile for the magnetization from the track, the area under the microtrack profile became proportional to the width of the track on the media. A least squares fit of profile width versus area was used to estimate read-width. The method was relatively insensitive to position errors on the spin-stand.
Sponsorship	IEEE Magnetics Society
Starting Page	2598
Ending Page	2600
Page Count	3
File Size	107544
File Format	PDF
ISSN	00189464
Volume Number	40
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-07-01
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 recording Magnetic sensors Magnetic analysis Sensor phenomena and characterization Voltage Shape Pulse shaping methods Signal to noise ratio Magnetization Least squares approximation
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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