Abstract
The local structure of the Mn in a GaMnN film was investigated using extended X-ray absorption fine structure (EXAFS) analysis. This GaMnN film shows ferromagnetism with an extremely high Curie temperature above 740 K. We carried out EXAFS measurement of the K-edge of the Mn and Ga in this sample using a fluorescence-yield mode. The local structure of the atoms around the Mn is in good agreement with that around Ga, indicating that the Mn atoms substitute for Ga in GaN.