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

doi:10.1063/1.1408605

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

Tohoku University

Research output: Contribution to journal › Article › peer-review

37 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	2001-2003
Number of pages	3
Journal	Applied Physics Letters
Volume	79
Issue number	13
DOIs	https://doi.org/10.1063/1.1408605
Publication status	Published - 2001 Sept 24

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AU - Yamaguchi, H.

AU - Kitakami, O.

AU - Okamoto, S.

AU - Shimada, Y.

AU - Oikawa, K.

AU - Fukamichi, K.

PY - 2001/9/24

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N2 - 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.

AB - 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.

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

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