Micromagnetic recording field analysis of fast-switching single-pole-type heads for bit-patterned media

Y. Kanai, M. Saiki, K. Hirasawa, T. Tsukamoto, K. Yoshida, S. J. Greaves, H. Muraoka

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

A Landau-Lifshitz-Gilbert (LLG) micromagnetic analysis of the recording field of single-pole-type (SPT) heads was carried out. The whole volume comprising the SPT head and the double-layered medium was treated micromagnetically using the finite-difference method with cubic cells as small as 5 nm, giving a total number of cells of more than 10.8 million. A parallelized fast Fourier transform (FFT) method was used to solve this large-scale problem. Dynamic recording fields were calculated for various head structures and head materials. The timing (synchronization) between the dynamic head field and land location in bit-patterned media (BPM) is discussed and the design methodology is discussed for a fast-switching SPT head.

Original languageEnglish
Pages (from-to)e287-e290
JournalJournal of Magnetism and Magnetic Materials
Volume320
Issue number14
DOIs
Publication statusPublished - 2008 Jul 1

Keywords

  • Bit-patterned media
  • LLG micromagnetic analysis
  • Parallel computing
  • Perpendicular magnetic recording
  • Single-pole-type (SPT) head

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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