Electronic Structures of Rare-earth Half-metallic Ferromagnet CoLa2O4

The half-metallic ferromagnet CoLa2O4 was predicted based on density function theory. Its magnetic and electric properties were studied systematically. Results show that CoLa2O4 has half-metallicity and its molecular magnetic moment is 3.00 µB, which is lower than 4.0 µB of Fe3O4. CoLa2O4 is more sensitive than Fe3O4 in the same applied field. La-ions have little spin polarization. The electronic structures of a Co-ion and a La-ion are a1g1↑a1g1↓t1u3↑t1u3↓eg2↑eg2↓t2g3↑ and a1g1↑a1g1↓t1u3↑t1u3↓ t2g3↑t2g3↓eg2↑eg2↓eg2*↑eg2*↓, respectively.