Nip seed layer effect on [Co/Pd]n/Pd/(NiP)/FeCoC perpendicular recording media for extremely high areal density

Eng Wei Soo, Weiwei Jiang, Lianjun Wu, Jian Ping Wang

Research output: Contribution to journalArticlepeer-review

Abstract

The effect of NiP as a seed layer for the [Co/Pd]n multilayer perpendicular recording media was studied. It was found that a thin layer of 2 nm NiP inserted between the FeCoC soft magnetic underlayer and the [Co/Pd]n recording layer improved the magnetic properties such as coercivity, squareness and nucleation field. These improvements may be due to the enhanced grain isolation promoted by the NiP seed layer, as well as the lower surface roughness of the NiP seed layer. Read/write test using Guzik spin stand with a ring-type head showed a D50 value 220kFCI in the roll-off curve. The magnetic transitions recorded up to 390kFCI for [Co/Pd]n, media with the NiP seed layer can be observed clearly with MFM.

Original languageEnglish (US)
Pages (from-to)1740-1744
Number of pages5
JournalIEICE Transactions on Electronics
VolumeE85-C
Issue number10
StatePublished - Oct 2002

Keywords

  • Double-layered perpendicular media
  • Grain isolation
  • NiP seed layer
  • [Co/Pd] multilayer

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