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http://dx.doi.org/10.4283/JMAG.2005.10.1.028

Magnetic and Ordering Behavior of Nb-doped FePt Alloy Films  

Kim, Min-Kyu (Division of Materials Science and Engineering, Korea University)
Lee, Seong-Rae (Division of Materials Science and Engineering, Korea University)
Publication Information
Journal of Magnetics / v.10, no.1, 2005 , pp. 28-32 More about this Journal
Abstract
The magnetic properties and ordering behavior of Nb-doped FePt alloy films prepared by dc-magnetron sputtering were investigated. It was found that Nb addition retarded the ordering reaction from the disordered face-centered-cubic (fcc) Al phase to the ordered face-centered-tetragonal (fct) L10 phase. The tetragonality (c/a ratio) of the ordered fct L10 phase increased with the Nb concentration. Nb addition hampered c-axis contraction during ordering, probably because the larger Nb atoms occupy Pt sites. Consequently, the coercivity and magnetocrystalline anisotropic energy of Nb-doped FePt alloy films are lower than those of un-doped FePt film under equivalent annealing conditions.
Keywords
FePt alloy film; Nb-doping; magnetic properties; ordering transformation; microstructure;
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  • Reference
1 B. Zhang and W. A. Soffa, IEEE Trans. Magn. 26, 1388 (1990)
2 K. R. Coffey, M. A. Parker, and J. K. Howard, IEEE Trans. Magn. 36, 2737 (1995)   DOI   ScienceOn
3 C.-M. Kuo, P. C. Kuo, W.-C. Hsu, C.-T. Li, and A.-C. Sun, J. Magn. Magn. Mater. 209, 100 (2000)
4 P. C. Kuo, Y. D. Yao, C.-M. Kuo, and H. C. Wu, J. Appl. Phys. 87, 6146 (2000)
5 S.-R. Lee, S. H. Yang, Y. K. Kim, and J. G. Na, Appl. Phys. Lett. 78, 4001 (2001)   DOI   ScienceOn
6 S. K. Chen, F. T. Yuan, W. C. Chang, and T.-S. Chin, J. Magn. Magn. Mater. 239, 471 (2002)
7 P. J. Meschter and W. L. Worrell, Met. Trans. A 8, 503 (1977)
8 L. Brewer, Acta Metall. 15, 553 (1967)
9 A. Z. Men'shikov, Yu. A. Dorofeyev, V. A. Kazanstsev, and S. K. Sidorov, Fiz. Metal. Metalloved. 38, 505 (1974)
10 S.-R. Lee, S. H. Yang, Y. K. Kim, and J. G. Na, J. Appl. Phys. 91, 6857 (2002)   DOI   ScienceOn
11 K. M. Park, K. H. Na, J. G. Na, P. W. Jang, H. J. Kim, and S. R. Lee, IEEE Trans. Mag. 38, 1961 (2002)   DOI   ScienceOn
12 O. Kitakarni, Y. Shimada, K. Oikawa, H. Daimon, and K. Fukamichi, Appl. Phys. Lett. 78, 1104 (2001)   DOI   ScienceOn
13 Y. K. Takahashi, M. Ohnuma, and K. Hono, J. Magn. Magn. Mater. 246, 259 (2002)
14 T. Maeda, T. Kai, A. Kikitsu, T. Nagase, and J. Akiyama, Appl. Phys. Lett. 80, 2147 (2002)
15 K. H. Na, C. H. Park, J. G. Na, P. W. Jang, C. S. Kim, and S. R. Lee, J. of Magnetics 4(4), 119 (1999)
16 C. L. Platt, K. W. Wierman, E. B. Svedberg, R. van de Veerdonk, J. K. Howard, A. G. Roy, and D. E. Laughlin, J. Appl. Phys. 92, 6104 (2002)