Coupled granular/continuous perpendicular recording media with soft magnetic underlayer

Y. Sonobe, H. Muraoka, K. Miura, Y. Nakamura, K. Takano, H. Do, A. Moser, B. K. Yen, Y. Ikeda, N. Supper

研究成果: Article査読

25 被引用数 (Scopus)

抄録

Fabrication, magnetic properties, and read/write characteristics of coupled granular/continuous (CGC) perpendicular media are described. The media consist of continuous Co/Pt multilayers, which have a strong in-plane exchange coupling, and a granular CoCrPt layer on top of a soft magnetic underlayer. These continuous and granular layers are magnetically coupled, thus the switching field distribution becomes effectively narrower. Recording measurements using a single-pole writer and a giant magnetoresistive reader show substantial improvement in the head output and resolution of the CGC medium, compared to the plain granular medium. Transition jitter and medium noise are reduced in the CGC media. As a result, the CGC media have 3-5 dB higher signal-to-noise ratio (SNR) and better thermal stability than the plain granular medium. The concept of CGC perpendicular media is a viable way to achieve both the thermal stability and medium SNR requirements for high-density recording.

本文言語English
ページ(範囲)8055-8057
ページ数3
ジャーナルJournal of Applied Physics
91
10 I
DOI
出版ステータスPublished - 2002 5月 15

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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