CrMn underlayers for CoCrPt thin film media

Journal Article · Wed Jul 01 00:00:00 EDT 1998 · IEEE Transactions on Magnetics

OSTI ID:649527

Lee, L L ^[1]; Laughlin, D E; Lambeth, D N ^[2]

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1. Intevac Inc., Santa Clara, CA (United States)
2. Carnegie Mellon Univ., Pittsburgh, PA (United States). Data Storage Systems Center

An improved CoCrPt thin film medium or longitudinal magnetic recording which has a coercivity significantly greater than prior CoCrPt thin film media was investigated. A CrMn alloy underlayer was used, instead of the conventional Cr underlayer. A coercivity value of 4,280 Oe was easily reached in a CoCrPt film on a 50 nm thick CrMn underlayer as compared to 2,810 Oe with a pure Cr underlayer. It was found that the coercivity increase due to the Mn addition was realized if the substrates were preheated before the sputtering. Grain boundary interdiffusion of Mn from the underlayer to the magnetic layer may be the cause for the coercivity increase.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-90ER45423
• OSTI ID: 649527
• Report Number(s): CONF-980102-; ISSN 0018-9464; TRN: IM9825%%140
• Journal Information: IEEE Transactions on Magnetics, Vol. 34, Issue 4Pt1; Conference: 7. joint MMM-intermag conference, San Francisco, CA (United States), 6-9 Jan 1998; Other Information: PBD: Jul 1998
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COBALT ALLOYS
CHROMIUM ALLOYS
PLATINUM ALLOYS
COERCIVE FORCE
THIN FILMS
MANGANESE ALLOYS
LAYERS
METALLURGICAL EFFECTS
SUBSTRATES