Micromagnetic Studies of Recording Process in Patterned Magnetic Media

Dan WEI  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E85-C   No.10   pp.1756-1760
Publication Date: 2002/10/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Recent Progress in Information Storage Technology)
Category: 
Keyword: 
patterned magnetic media,  perpendicular recording,  write process,  simulation,  

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Summary: 
Patterned magnetic media are promising to be the next generation recording media for computer hard disk drives to go beyond the density of 100 Gb/in2. A micromagnetic simulation model is set up to study the magnetic property as well as the recording process in patterned media. The patterned medium studied in this paper is an array of pillar magnetic particles with a perpendicular anisotropy. A pole record head as well as a thin film head are utilized in the simulated recording process. The diameter of the magnetic pillars is chosen as 20 nm, the bit length takes the values of 30 nm, 40 nm and 50 nm, with respect to an ideal areal density of 258 Gb/in2, 459 Gb/in2 and 717 Gb/in2. The magnetic signal and noise recorded in a series of patterned media are analyzed at different recording densities with the two types of record heads.