Acta Metallurgica Sinica (English Letters) >
Abnormal saturation magnetization dependency on W content for Co-W thin films
Received date: 2009-02-06
Revised date: 2009-03-07
Online published: 2010-02-09
A series of hexagonal close-packed (HCP) Co-W thin films were deposited by sputtering on surface oxidized silicon substrates at 300℃. A linear dependency of saturation magnetization (Ms) on W content was found up to about 9~at.~pct W, and then it underwent an increased Ms vs. W content curve as compared to the initial linear dependency. The thermal magnetization technique was used to confirm that the increased Ms behaviour is correlated to the phase separation of the Co-W thin films. The phase separation behaviour was also found to be dependent on W content and the reason was discussed in detail. Finally an interesting composition range was suggested to be about 13at.pct-17 at. pct W for the Co-W thin films, in which they exhibit much higher magnetic anisotropy energy than Co-Cr thin films and improved phase separation.
YANG Bei , QIN Gao-Wu , FEI Wen-Li , REN Yu-Beng , XIAO Na , DIAO Xiang . Abnormal saturation magnetization dependency on W content for Co-W thin films[J]. Acta Metallurgica Sinica (English Letters), 2010 , 23(1) : 8 -12 . DOI: 10.11890/1006-7191-101-8
[1] D. Weller and M.F. Doerner, Annu Rev Mater Sci 30 (2000) 611.
[2] K. Oikawa, G.W. Qin, M. Sato, S. Okamoto, O. Kitakami,Y. Shimada, K. Fukamichi, K. Ishida and T. Koyama, Appl Phys Lett 85 (2004) 2559.
[3] K. Oikawa, G.W. Qin, M. Sato, O. Kitakami, Y. Shimada, J.Sato, K. Fukamichi and K. Ishida, Appl Phys Lett 83 (2003) 966.
[4] G.W. Qin, K. Oikawa, M. Sato, O. Kitakami, Y. Shimada,K. Fukamichi and K. Ishida, IEEE Trans Magn 41 (2005)918.
[5] M. Sato, G.W. Qin, K. Oikawa, S. Okamoto, O. Kitakami and Y. Shimada, J Magn Soc Jpn 28 (2004) 245.
[6] N. Kikuchi, O. Kitakami, S. Okamoto, Y. Shimada, A. Sakuma,Y. Otani and K. Fukamichi, J Phys Condensed Matter 11 (1999) L485.
/
| 〈 |
|
〉 |
WeChat