Effects of B and C on the ordering of L10-CoPt thin films

H. Yamaguchi, O. Kitakami, S. Okamoto, Y. Shimada, K. Oikawa, K. Fukamichi

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)


We have investigated the effects of B and C on the ordering of L10-CoPt films and confirmed the following quite different role between B and C in CoPt. A small amount of B considerably decreases the temperature for ordering and is interstitially incorporated into L10-CoPt along its c axis due to the large negative heat of solutions with Co and Pt. X-ray photoelectron spectroscopy analyses have revealed that B atoms combine with Co and Pt. In contrast, C is not incorporated into the CoPt lattice due to its positive heat of solution, resulting in no decrease in the ordering temperature. The present results reveal that CoPt films containing a small amount of B are promising for high density recording media.

Original languageEnglish
Pages (from-to)2001-2003
Number of pages3
JournalApplied Physics Letters
Issue number13
Publication statusPublished - 2001 Sept 24


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