Possible origin of ferromagnetism in (Ga,Mn)N

Ferromagnetic behavior of GaN doped with Mn (Ga1-zMnzN) grown by the ammonothermal and chemical transport methods is discussed in terms of a second phase (ferromagnetic one) produced during the growth process. The reference manganese nitride samples grown by the same method as (Ga,Mn)N reveal room-temperature ferromagnetic behavior, depending on the growth details. Different MnxNy phases are suggested to be responsible for ferromagnetic behavior of (Ga,Mn)N. (C) 2003 American Institute of Physics.