Giri:
James is right. IBM continues to lead the industry in R&D, especially MR recording. I don't know enough of the "...four component magnetic alloy" to make an intelligent comment at this point. However, there is an article in the current edition of THE IBM JOURNAL OF RESEARCH & DEVELOPMENT that may provide some insights:
Thin-film media--Current and future technology
by K. E. Johnson, C. M. Mate, J. A. Merz, R. L. White, and A. W. Wu
In the last ten years, the fundamental technology of recording media has evolved from particulate to thin film. The introduction of magnetoresistive heads in 1990 has had further impact on the design of thin-film media. Changes in substrates, magnetic films, overcoats, and lubrication form the basis of the evolution. Design concepts and manufacturing considerations for high-areal-density thin-film disks are described in this paper, with reflections on future enhancements required for media of the next generation.
You can order the issue which contains this article for $20 using
Volume 40, number 5 - nontopical issue, issue order #G322-0205 as the reference number when you call 1-800-IBM-Journals (1-800-426-5687).
You can also find more information at almaden.ibm.com
Gus |
