The Mn-site-projected electronic structure of the diluted magnetic semiconductors Ga1-xMnxAs (x =0.032, 0.038, 0.047, 0.052, 0.058) of as-grown and low-temperature-(LT) annealed samples are systematically studied using high-resolution Mn 2p absorption spectroscopy. The study exhibits coexistence of the ferromagnetic Mn2+ ion and the paramagnetic Mn-As complex that transforms into the ferromagnetic component with LT annealing. The ratio of ferromagnetic to paramagnetic components is directly related to the x dependence of the hole density and ferromagnetic critical temperature.
|Number of pages||4|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - Jun 15 2002|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics