Grain size reduction in Co/Pd multilayer perpendicular magnetic recording media with NiAl as a seedlayer and a pinning layer

Lianjun Wu, Engwei Soo, J. P. Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Co/Pd multilayer films have been extensively studied as perpendicular magnetic recording media. One of the key issues for realizing the high recording densities is to reduce the grain size. The perpendicular magnetic anisotropy for the Co/Pd multilayer films is mainly from the interface magnetic anisotropy, rather than the crystalline magnetic anisotropy for CoCr alloy or FePt perpendicular magnetic recording media. Therefore techniques used for grain size reduction for longitudinal magnetic recording media can also be applied for Co/Pd multilayer perpendicular media. NiAl has been widely used to reduce the grain size for longitudinal magnetic recording media. In this work, NiAl was introduced as a seedlayer for Co/Pd multilayer media and also as a pinning layer into the Co/Pd multilayer media. Co/Pd multilayer films were prepared on glass substrates using DC magnetron sputtering at room temperature. The sputtering Ar gas pressure was 20 mtorr. Magnetic properties were measured with an alternate gradient force magnetometer (AGFM). Film surface structures were observed with atomic force microscopy (AFM).

Original languageEnglish (US)
Title of host publicationINTERMAG Europe 2002 - IEEE International Magnetics Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)0780373650, 9780780373655
DOIs
StatePublished - 2002
Event2002 IEEE International Magnetics Conference, INTERMAG Europe 2002 - Amsterdam, Netherlands
Duration: Apr 28 2002May 2 2002

Other

Other2002 IEEE International Magnetics Conference, INTERMAG Europe 2002
CountryNetherlands
CityAmsterdam
Period4/28/025/2/02

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