Prediction of effective elements for magnetically induced phase separation in Co-Cr-based magnetic recording media

K. Oikawa, G. W. Qin, O. Kitakami, Y. Shimada, K. Fukamichi, K. Ishida

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Thermodynamic calculations of the magnetically induced phase separation of the hcp phase in Co-Cr-based alloy systems, which is the origin of the compositional modulation observed in magnetic recording media, have been carried out. The magnetic and nonmagnetic terms in the Gibbs energy are evaluated from available thermodynamic data and Miedema's semiempirical values. It is demonstrated that the phase separation in Co-Cr-X ternary alloys can be classified into four types, depending on the values of interaction energies between Co and/or Cr and X atoms. Existing magnetic data on Co-Cr-based recording media are discussed in terms of the phase stability of the hcp phases. The present calculations would be useful for development of high-density magnetic recording media.

Original languageEnglish
Pages (from-to)644-646
Number of pages3
JournalApplied Physics Letters
Volume79
Issue number5
DOIs
Publication statusPublished - 2001 Jul 30

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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