Title :
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
fDate :
9/1/1996 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
