We present a density functional study of Fe doped into the tetrahedral and octahedral cation sites of the wide-band-gap spinel $\mathrm{Zn}{\mathrm{Ga}}_2{\mathrm{O}}_4$. We calculate the electronic structure for different substitutions and discuss the magnetic and transport properties for each case considering different approximations for the exchange-correlation potential. We show that for certain doped cases, significant differences in the predicted behavior are obtained depending on the exchange-correlation potential adopted. Possible applications of the doped systems as magnetic semiconductors are outlined.

• Received 11 January 2006

DOI:https://doi.org/10.1103/PhysRevB.73.205204