Ferromagnetic ordering of n-type (Ga,Mn)N epitaxial films

✍ Scribed by J.M. Lee; K.I. Lee; J.Y. Chang; M.H. Ham; K.S. Huh; J.M. Myoung; W.J. Hwang; M.W. Shin; S.H. Han; H.J. Kim; W.Y. Lee

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 210 KB
• Volume: 69
• Category: Article
• ISSN: 0167-9317
• DOI: 10.1016/s0167-9317(03)00311-3

✦ Synopsis

The magnetic and magnetotransport properties of epitaxial (Ga Mn )N films with low Mn concentration (x50.06-12x x 0.5%) grown by plasma-enhanced molecular beam epitaxy have been investigated. Ferromagnetic ordering for the GaMnN is clearly seen in the temperature range 4-300 K. The M-T curves were fitted with theoretical equations based on the mean field theory in order to estimate Curie temperature (T ), providing T ¯550 K and T ¯700 K, respectively, for the (Ga,Mn)N c c c films with x50.16% and x50.50%. Temperature dependence of sheet resistance is found to show negative magnetoresistance in the temperature range 4-300 K, indicative of ferromagnetic semiconducting (Ga,Mn)N films.