Magnetotransport in Ferromagnetic (Ga,Mn)N Epitaxial Films


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We present the ferromagnetism and magnetotransport properties in the (Ga,Mn)N epitaxial films with very low Mn concentrations grown by plasma-enhanced molecular beam epitaxy (PEMBE). The (Ga,Mn)N epitaxial films were found to exhibit ferromagnetic ordering with Curie temperature of 700 K. All the films exhibit n-type characteristics. The negative magnetoresistance was observed below 150 K, and found to gradually increase with decreasing temperature. The ferromagnetism in the (Ga,Mn)N is due to the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between the localized Mn moments mediated by the electron gas.



Materials Science Forum (Volumes 449-452)

Edited by:

S.-G. Kang and T. Kobayashi




M.H. Ham et al., "Magnetotransport in Ferromagnetic (Ga,Mn)N Epitaxial Films ", Materials Science Forum, Vols. 449-452, pp. 1041-1044, 2004

Online since:

March 2004




[1] H. Ohno, Science Vol. 281 (1998), p.951.

[2] K. W. Edmonds, K. Y. Wang, R. P. Campion, A. C. Neumann, N. R. S. Farley, B. L. Gallagher, and C. T. Foxon, Appl. Phys. Lett. Vol. 81 (2002), p.4991.

[3] T. Dietl, H. Ohno, F. Matsukura, J. Cibert, and D. Ferrand, Science Vol. 287 (2000), p.1019.

[4] S. Nakamura and G. Fasol: The Blue Laser Diode – GaN Based Light Emitters and Lasers (Springer – Verlag, Berlin 1997).

[5] Y. D. Park, A. T. Hanbicki, S. C. Erwin, C. S. Hellberg, J. M. Sullivan, J. E. Mattson, T. F. Ambrose, A. Wilson, G. Spanos, and B. T. Jonker, Science Vol. 295 (2002), p.651.

[6] J. Y. Chang, G. H. Kim, J. M. Lee, S. H. Han, H. J. Kim, W. Y. Lee, M. H. Ham, K. S. Huh, and J. M. Myoung, J. Appl. Phys. Vol. 93 (2003), 7858.

[7] H. Ohno, A. Shen, F. Matsukura, A. Oiwa, A. Endo, S. Katsumoto, and Y. Iye, Appl. Phys. Lett. Vol. 69 (1996), p.363.

[8] J. M. Lee, J. K. Jung, and S. H. Lim, J. Magn. Magn. Mater. Vol. 234 (2001), p.133.

[9] R. Y. Korotkov, J. M. Gregie, and B. W. Wessels, Appl. Phys. Lett. Vol. 80 (2002), p.1731.

[10] R. N. Bhatt, M. Berciu, M. P. Kennett, and Xin Wan, J. Superconductivity Vol. 15 (2002), p.71.

[11] Y. Iye, A. Oiwa, A. Endo, S. Katsumoto, F. Matsukura, A. Shen, H. Ohno, and H. Munekata, Mater. Sci. and Eng. B Vol. 63 (1999), p.88.