Recording performance of CoCrPt-(Ta, B)/TiCr perpendicular recording media

H. Uwazumi, T. Shimatsu, Y. Sakai, A. Otsuki, I. Watanabe, H. Muraoka, Y. Nakamura

Research output: Contribution to journalConference articlepeer-review

19 Citations (Scopus)


The magnetic properties, microstructure and the recording performances of CoCrPt-(Ta, B)/TiCr perpendicular magnetic recording media were studied in conjunction with the effect of thermal agitation. The addition of Ta or B to CoCrPt media significantly improves its low noise performance, mainly due to the reduction of grain size and intergranular magnetic interactions. However, adding Ta or B also reduces the value of perpendicular magnetic anisotropy, Ku, especially in the initial growth layer, resulting in the degradation of thermal stability. In order to achieve high thermal stability without degrading the low noise performance of these media, an Mr/Ms value of nearly 1.0 is required. This may be achieved by suppressing of the reduction of Ku and the reducing intergranular magnetic interactions, whilst maintaining their small grain size.

Original languageEnglish
Pages (from-to)1595-1598
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number4 I
Publication statusPublished - 2001 Jul
Event8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States
Duration: 2001 Jan 72001 Jan 11


  • CoCrPt-(Ta, B)
  • Media noise performances
  • Microstructure
  • Perpendicular recording media
  • Thermal agitation


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