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Ion Implantation Synthesis and Characterization of Cobalt Nanodots

  • L.G. Jacobsohn (a1), M.E. Hawley (a1), R.M. Dickerson (a1), D.W. Cooke (a1) and M. Nastasi (a1)...


A study of the synthesis of Co nanodots by ion implantation was carried out. Silica was implanted with 35 keV Co+ ion beams with doses of 8×1015, 3×1016 and 1×1017 at/cm2 and transmission electron microscopy revealed the presence of spherical nanodots in these samples. Annealing in vacuum at 900 oC was used to change the size distribution of the nanodots. The annealed samples presented an absorption band related to the plasmon collective excitation of the metallic nanodots that redshifted for higher Co contents. The magnetic character of the samples was revealed by magnetic force microscopy measurements that showed the presence of randomly distributed structures with defined magnetization in the case of annealed samples. This work shows the feasibility of synthesizing Co nanodots with controlled size distribution.



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1. Cowburn, R.P., J. Magn. Magn. Mater., 242-245, 505 (2002)
2. Brown, W.F., J. Appl. Phys., 39, 993 (1968)
3. Puntes, V.F., Krishnan, K.M. and Alivisatos, A.P., Science, 291, 2115 (2001)
4. Chen, J.P., Sorensen, C.M., Klabunde, K.J. and Hadjipanayis, G.C., Phys. Rev. B, 51, 11527 (1995)
5. Lin, X.M., Sorensen, C.M., Klabunde, K.J. and Hajipanayis, G.C., J. Mater. Res., 14, 1542 (1999)
6. Woods, S.I., Kirtley, J.R., Sun, S. and Koch, R.H., Phys. Rev. Lett., 87, 7205 (2001)
7. Held, G.A., Grinstein, G., Doyle, H., Sun, S. and Murray, C.B., Phys. Rev. B, 64, 2408 (2001)
10. Bohren, C.F. and Huffman, D.R. in Absorption and Scattering of Light by Small Particles (Willey-InerScience, New York, 1983)
11. Kreibig, U. and Vollmer, M. in Optical Properties of Metal Clusters, Springer series in materials Science, vol. 25, Berlin, Germany (1995)
12. Cattaruzza, E., Gonella, F., Mattei, G., Mazzoldi, P., Gatteschi, D., Sangregorio, C., Falconieri, M. and Salvetti, G., Appl. Phys. Lett., 73, 1176 (1998)
13. Brandes, E.A. (editor), Smithells Metals Reference Book (Butterworths & Co. Publishers, London, 6th edition, 1983) p. 8–21 to 835
14. Lide, D.R. (editor), CRC Handbook of Chemistry and Physics (CRC Press, Boca Raton, 78th edition, 1997) p. 581
15. Zhang, Y., Winzell, T., Zhang, T., Andersson, M., Maximov, I.A., Sarwe, E.L., Graczyk, M., Montelius, L. and Whitlow, H.J., Nuc. Instr. Meth. Phys. Res. B, 159, 142 (1999)
16. Borodin, V.A., and, K.H. Heinig Reiss, S., Phys. Rev. B, 56, 5332 (1997)
17. Yao, X.Y., Fojas, P.B., Brown, I.G. and Rubin, M.D., Nuc. Instr. Meth. Phys. Res. B, 80/81, 1171 (1993)
18. Savoini, B., Ballesteros, C., Santiuste, J.E.M. and Gonzalez, R., Phys. Rev. B, 57, 13439 (1998)
19. Klocek, P. (editor) in Hanbook of Infrared Optical Materials, Marcel Dekker Inc., New York, USA (1991) p.346
20. Brako, R., J. Phys. C, 11, 3345 (1978)
21. Liu, Z., Li, H., Feng, X., Ren, S., Wang, H., Liu, Z. and Lu, B., J. Appl. Phys., 84, 1913 (1998)
22. Itoh, T., Asahi, T. and Masuhara, H., Jpn. J. Appl. Phys., 41, L76 (2002)
23. Mandal, S.K., Roy, R.K. and Pal, A.K., J. Phys. D, 35, 2198 (2002)


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