Ferromagnetism of Mn-doped GaN polycrystalline powders

Ferromagnetic ordering is observed in Mn-doped GaN polycrystalline powders synthesized by a modified solid-state metathesis route. The synthesized powders show hysteresis loops at 150 K. Curie temperature is about 300 K concluded from the difference between the field-cooled and zero-field-cooled magnetizations. The characterizations of the powder samples by powder X-ray diffraction, inductively coupled plasma-atomic emission spectrometry, and temperature dependence of magnetizations suggest that the room-temperature ferromagnetic ordering is the intrinsic property of Mn-doped GaN.