Abstract
The first-principles calculations method based on density functional theory was employed to study the electronic structures and magnetic properties in Cr doped GaSb systematically. The studied results shown that both CrGa and CrSb substitutions can induce 3 local magnetic moment. The magnetic interactions among CrGas and CrSbs are all ferromagnetic with higher Curie temperature, and the ferromagnetic mechanism is also discussed. The smaller formation energy of CrGa indicated that CrGa plays an important role on the ferromagnetism in Cr doped GaSb. These results should be useful for the realization of higher temperature and inherent ferromagnetic semiconductor in GaSb system.
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