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--
• Journal Information: IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 4Pt1 Vol. 34; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

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