Title :
Noise characteristics and writeability on perpendicular recording media
Author :
Li, Shaoping ; Lei, Wang ; Zhu, Wenzhong ; Chen, Jian ; Kaiser, David ; Michel, Rich ; Vonfeldt, Jack ; Palmer, Dean ; Weispfenning, James
Author_Institution :
Seagate Technol. LLC, Bloomington, MN, USA
fDate :
9/1/2002 12:00:00 AM
Abstract :
A FFT-filtering-IFFT technique, based on magnetic force microscopy (MFM) image analysis, has been employed to extract and then analyze the perpendicular media noise and its characteristics at various linear densities. The experimental results from examined media indicate that the predominant media noise at high recording density originate from a magnetic cluster formation and coarsening process, suggesting that one of the present difficulties for achieving high linear density in perpendicular recording scheme resides in the head/media writeability issues.
Keywords :
fast Fourier transforms; magnetic force microscopy; magnetic heads; magnetic multilayers; magnetic recording noise; perpendicular magnetic recording; FFT-filtering-IFFT technique; coarsening process; head/media writeability issues; high recording density; linear densities; magnetic cluster formation; magnetic force microscopy image analysis; multilayer media; noise characteristics; perpendicular recording media; Image analysis; Magnetic analysis; Magnetic force microscopy; Magnetic forces; Magnetic heads; Magnetic multilayers; Magnetic noise; Microstructure; Perpendicular magnetic recording; Transmission electron microscopy;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.801820
