Magnetotransport in Ferromagnetic (Ga,Mn)N Epitaxial Films

Abstract:

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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.

Info:

Periodical:

Materials Science Forum (Volumes 449-452)

Edited by:

S.-G. Kang and T. Kobayashi

Pages:

1041-1044

DOI:

10.4028/www.scientific.net/MSF.449-452.1041

Citation:

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

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$35.00

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