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

Volume

46

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

2462

Lastpage

2465

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

Conference_Location

6/1/2010 12:00:00 AM

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2009.2039859

Filename

5467702