A novel analysis method for noise of perpendicular recording media

Wenli Pei, G. W. Qin, S. Ishio, Y. P. Ren, H. Saito, T. Washiya, K. Miura, H. Muraoka, F. Z. Lian, N. Honda

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

An in-field magnetic force microscopy (MFM) observation technology was introduced to study media noise in perpendicular recording medium. Magnetization reversal field (HR) distribution of the recording medium could be mapped by this technology. We have extracted media noise signal image from recording pattern. The noise signal image was converted to a contour image, in which peak areas represented high-noise areas. To clarify the relationship between HR distribution and the media noise, we novelly combined the contour with the HR-map. The results show that the media noise mostly gets generated in the lower-HR areas, which indicates the lower-HR area is one of the important origins of the media noise. For comparison, a simulation work was also performed by introducing a model based on experimental parameters. The simulation agreed with experimental results very well.

Original languageEnglish
Pages (from-to)3165-3168
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume320
Issue number22
DOIs
Publication statusPublished - 2008 Nov 1

Keywords

  • H-map
  • In-field MFM observation
  • Perpendicular recording media
  • Recording media noise

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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