NDLI: Remanence and longitudinal recording properties of advanced particulate media and metal thin-film media

Content Provider	IEEE Xplore Digital Library
Author	Simmons, R.G.
Copyright Year	1965
Abstract	A comparison is made of the magnetic remanence and longitudinal recording properties of advanced particulate media with metal thin-film media. The remanence properties were studied parallel and orthogonal to the track direction and were diagnostic of recording performance. The recording properties were measured using thin-film heads with inductive-write and magnetoresistive-read elements. Longitudinal barium ferrite and isotropic cobalt alloy media show substantially narrower switching field distributions (SFDs) compared to acicular cobalt-modified gamma -Fe/sub 2/O/sub 3/ media. Narrow SFD, high H/sub c/, and small M/sub r/ delta lead to small, well-defined magnetic transitions and high bit densities. Indeed, there is a linear correlation between the calculated transition length, a, and the linear density. Results confirm that particulate barium ferrite and cobalt alloy media have very small transition lengths and high linear densities. Cobalt-modified gamma -Fe/sub 2/O/sub 3/ media show lower linear densities; however, their intrinsic signal-to-noise ratios (SNR) are much higher compared to the barium ferrite and cobalt alloy media. The trend of noise with increasing density or frequency differs for the three types of media.<>
Sponsorship	IEEE Magnetics Society
Starting Page	93
Ending Page	96
Page Count	4
File Size	456482
File Format	PDF
ISSN	00189464
Volume Number	26
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1990-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Remanence Magnetic recording Barium Ferrites Cobalt alloys Magnetic properties Signal to noise ratio Magnetic films Magnetic field measurement Transistors
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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