Direct Observation Of Room-Temperature Ferromagnetism Of Single-Phase Ga0.962mn0.038n By Magnetic Force Microscopy

Magnetic force microscopy (MFM) observations have been performed on artificial structures of single-phase Ga0.962Mn0.038N grown by metal organic chemical vapor deposition, showing room-temperature long range magnetic order of Ga0.962Mn0.038N. The MFM results agree well with the theoretical simulation under assumption of uniform magnetization. The ferromagnetism of Ga1-xMnxN is suggested to be closely related to the configuration of Mnn+ and Mn(n+1)+ (n=2,3). This work indicates potential of effectively applying MFM to a variety of weak magnetic epitaxial thin films. (C) 2010 American Institute of Physics. [doi:10.1063/1.3503460]