Influence of Transition Percolation on Media Noise in Perpendicular Double Layered Media

Mitsuhiro Hashimoto, Kenji Miura, Hiroaki Muraoka, Hajime Aoi, Yoshihisa Nakamura

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Medium noise of perpendicular double layer media is investigated in conjunction with transition irregularity. The noise is typically proportional to the square root of linear density, but it saturates at a particular density. This nonlinear noise behavior is explained by clusters consisting of several grains becoming minimum magnetic units. A simulation with a media model using Voronoi cells is carried out based on this result; it also gives good agreement with experimental results. Measured partial erasure quantitatively corresponds to the noise saturation. Clustering and partial erasure both suggest transition percolation; however, no supra-linear noise increase is usually observed. Noise characteristics in terms of percolation density suggest grain-clustering in perpendicular media.

Original languageEnglish
Pages (from-to)2624-2626
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number5 II
Publication statusPublished - 2003 Sep
Externally publishedYes


  • Medium noise
  • Perpendicular double layer media
  • Single-pole head
  • Transition percolation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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