Room-temperature ferromagnetism in Mn-doped semiconducting CdGeP2.
The chalcopyrite CdGeP2 doped with Mn have been recently found to exhibit room-temperature ferromagnetism. Isovalent substitution of the Cd site is expected, however, to create antiferromagnetism, in analogy with the well-known CdTe:Mn (d5) case. However, chalcopyrite semiconductors exhibit low-energy intrinsic defects. We show theoretically how ferromagnetism results from the interaction of Mn with hole-producing intrinsic defects.
Mahadevan
Priya
P
National Renewable Energy Laboratory, Golden, Colorado 80401, USA.
Zunger
Alex
A