Lorentz transmission electron microscopy study of micromagnetic structures in real computer hard disks

Author

Tang, K. ; Visokay, M.R. ; Ross, C.A. ; Ranjan, R. ; Yamashita, T. ; Sinclair, R.

Author_Institution

Dept. of Mater. Sci. & Eng., Stanford Univ., CA, USA

Volume

32

Issue

5

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

4130

Lastpage

4132

Abstract

We have studied micromagnetic structures in real computer hard disks, with emphasis on magnetic vortices and ripples at bit-transition regions and track edges, using Lorentz transmission electron microscopy (LTEM). A combined dimpling and chemical etching was used to produce LTEM specimens of Co alloy/Cr with large, uniformly thin areas from the typical C/Co alloy/Cr/NiP/Al(substrate) hard disk structures

Keywords

chromium; cobalt alloys; digital magnetic recording; etching; hard discs; magnetic domain walls; magnetic recording noise; transmission electron microscopy; C-Co₈₄Cr₁₀Ta₆-Cr-NiP-Al; C/Co alloy/Cr/NiP/Al hard disk structures; Co alloy/Cr; Lorentz transmission electron microscopy; bit-transition regions; chemical etching; computer hard disks; dark domain walls; dimpling; large uniformly thin areas; light domain walls; magnetic ripples; magnetic vortices; media noise; micromagnetic structures; track edges; Chemicals; Chromium alloys; Cobalt alloys; Disk recording; Etching; Hard disks; Magnetic recording; Micromagnetics; Saturation magnetization; Transmission electron microscopy;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.539317

Filename

539317