Overview of read/write scheme for perpendicular magnetic recording utilizing single-pole head and double layer media

Hiroaki Muraoka, Yoshihisa Nakamura

Research output: Contribution to journalConference article

12 Citations (Scopus)

Abstract

Head/media parameters of perpendicular magnetic recording to attain areal densities of 100-200 Gbits/in2 were investigated. Shield gap length, medium thickness, magnetic spacing, and transition width to realize the required PW50 for the densities were described first. Then, for the derived head/medium condition, maximum magnetic cluster size of the medium to satisfy medium noise requirements was predicted from experimental results and a theoretical noise consideration. Finally, minimum anisotropy energy for the medium to resist thermal signal decay was also considered. Results indicated that magnetic cluster average size, which was defined as magnetically grouped grains, and media anisotropy fields were to be 10nm and 19 kOe, respectively, in order to attain 200 Gbits/in2 recording. A new media structure to resolve the dilemma of media noise and thermal stability was also described.

Original languageEnglish
Pages (from-to)10-19
Number of pages10
JournalJournal of Magnetism and Magnetic Materials
Volume235
Issue number1-3
DOIs
Publication statusPublished - 2001 Oct 1
EventProceedings of the 5th Perpendicular Magnetic Recording Conference (PMRC 2000) - Sendai, Japan
Duration: 2000 Oct 232000 Oct 26

Keywords

  • CGC media
  • Double layer perpendicular media
  • Perpendicular magnetic recording
  • Thermal stability
  • Transition noise

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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