High thermal stability in CoPrTb/CoCrTa coupled granular-continuous perpendicular recording media

DOI Web Site 14 References

Bibliographic Information

Other Title
  • CoPrTb/CoCrTa垂直複合膜媒体の熱安定性と記録再生特性
  • CoPrTb CoCrTa スイチョク フクゴウ マク バイタイ ノ ネツ アンテイセイ ト キロク サイセイ トクセイ

Search this article

Description

Thermal stability and media noise performance of the CoPrTb/CoCrTa composite perpendicular media having CoZrNb soft back-layers are discussed. The composite media show higher recording sensitivity and better roll-off performance compared to those of individual CoCrTa or CoPrTb media. The D_<50> value of CoPrTb(10nm)/CoCrTa(20nm) composite medium is about 50 kFRPI higher, and the S/N value was about 10 dB higher (at 300 kFRPI), compared to those of the CoCrTa(30nm) medium. The composite medium shows very high thermal stability of read back signals even at low recording density, although the value of loop squareness M_r/M_s is smaller than 0.9. The CoPrTb layer is assumed to prevent the thermal reversal of individual grains of the CoCrTa layer by the interfacial exchange coupling, resulting in high thermal stability.

Journal

  • ITE Technical Report

    ITE Technical Report 25.37 (0), 19-24, 2001

    The Institute of Image Information and Television Engineers

References(14)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top