Finite-element and micromagnetic modeling of Write heads for shingled recording

Yasushi Kanai, Yoshihiro Jinbo, Toshio Tsukamoto, Simon John Greaves, Kazuetsu Yoshida, Hiroaki Muraoka

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

Finite element method (FEM) modeling was used in conjunction with micromagnetic media simulations to investigate new write heads for shingled recording targeting 2 terabit per square inch (Tbit\in2 and above on conventional continuous media. In order to obtain higher recording densities, an asymmetric main pole yoke, corner shields, and an ultimate MR read head were investigated. The validity of a FEM model solving Maxwell's equations (Maxwell FEM) was investigated and compared with a Landau-Lifshitz-Gilbert (LLG) micromagnetic model. It was found that the magnetostatic recording field obtained by Maxwell FEM and the quasi-static field obtained by micromagnetic calculation were in good agreement provided the micromagnetic mesh quality was good. It was also found that the dynamic recording field closely followed a driving current of up to 1.0 GHz. Finally, the required medium signal-to-noise ratio (SNR) was considered.

Original languageEnglish
Pages (from-to)715-721
Number of pages7
JournalIEEE Transactions on Magnetics
Volume46
Issue number3 PART 1
DOIs
Publication statusPublished - 2010 Mar 1

Keywords

  • Index Terms-Micromagnetic simulations
  • Perpendicular magnetic recording
  • Recording write heads
  • Shingled recording scheme

ASJC Scopus subject areas

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

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