Lorentz image-derived film media noise

Author

Ferrier, R.P. ; Martin, F.J. ; Arnoldussen, T.C. ; Nunnelley, L.L.

Author_Institution

Dept. of Phys. & Astron., Glasgow Univ., UK

Volume

24

Issue

6

fYear

1988

fDate

11/1/1988 12:00:00 AM

Firstpage

2709

Lastpage

2711

Abstract

Noise from thin-metal-film media is derived directly from Lorentz electron microscope images of the micromagnetic domain structure. In this first attempt to extract quantitative information from such images, Fe-Co-Cr alloy, a medium that is more easily interpretable than many others, is selected. For initial simplicity, noise from a bulk AC-erased disk is the focus of this analysis, rather than transition noise. A flux-noise spectrum is obtained from an image by processing and is compared with the same noise spectrum measured through a thin-film head flying over the disk

Keywords

chromium alloys; cobalt alloys; electron microscope examination of materials; iron alloys; magnetic domains; magnetic thin films; noise; storage media; Fe-Co-Cr alloy; Lorentz electron microscope images; bulk AC-erased disk; film media noise; flux-noise spectrum; image processing; magnetic storage media; micromagnetic domain structure; thin-metal-film media; Electron microscopy; Extraterrestrial measurements; Frequency; Magnetic films; Magnetic heads; Magnetic noise; Magnetization; Micromagnetics; Noise measurement; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92220

Filename

92220