Title :
HAMR Adjacent Track Stability in the Presence of a Medium Curie Temperature Distribution
Author :
Knight, Brian R. ; Bain, James A. ; Schlesinger, Tuviah E.
Author_Institution :
Carnegie Mellon Univ., Pittsburgh, PA, USA
fDate :
6/1/2010 12:00:00 AM
Abstract :
Evidence of a Curie temperature distribution has been observed in longitudinal media. These results were explained in terms of grain-to-grain variations in composition. Additives are under consideration for FePt HAMR media that may introduce such a distribution into HAMR media. Simple calculations are used to argue that a Curie temperature distribution is unlikely to affect adjacent track aging, but may widen transitions during the write process.
Keywords :
Curie temperature; ageing; iron alloys; magnetic recording; platinum alloys; temperature distribution; Curie temperature distribution; FePt; HAMR media; adjacent track aging; adjacent track stability; grain-to-grain variations; heat assisted magnetic recording drive; longitudinal media; write process; Aging; Energy barrier; Energy measurement; Heat-assisted magnetic recording; Magnetic field measurement; Magnetization; Stability; Temperature distribution; Temperature measurement; Time measurement; Adjacent track aging; Curie temperature; HAMR; distribution; thermal decay;
Journal_Title :
Magnetics, IEEE Transactions on
Conference_Location :
6/1/2010 12:00:00 AM
DOI :
10.1109/TMAG.2009.2039859
