Magnetic, electronic, high-spin polarization and half-metallic properties of Ru2VGe and Ru2VSb Heusler alloys: An FP-LAPW study

Electronic and magnetic properties of Ru2VGe and Ru2VSb have been calculated using full potential linearized augmented plane wane method. The optimized equilibrium lattice constants in stable Fm-3m configuration were found to be 6.032 Å for Ru2VGe and 6.272 Å for Ru2VSb. Spin-resolved calculations show that V mainly contributes to the magnetic properties in these materials. The materials follow the Slater-Pauling rule and hence have integral magnetic moments which is due to 100% spin polarization at Fermi energy. The calculated total magnetic moments per unit cell were found to be 1.0 µB for Ru2VGe and 2.0 µB for Ru2VSb. Both the materials having ferromagnetic ground state, exhibit half-metallicity with an energy gap in the spin-down channel of 0.095 eV for Ru2VGe and 0.186 eV for Ru2VSb.