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Density functional methods have been used to study the crystal, electronicand magnetic structures of new ordered double perovskites A2NRuO6 (A2 = Ba2,BaLa; N = V, Cr, Fe). In the doped compounds, the A-site was replaced by 1:1 ofBa and La cations, BaLaNRuO6. All compounds of A2NRuO6 crystallize in cubicsymmetry with space group Fm-3m and tilt system a0a0a0. The electronic andmagnetic calculations were performed by the full-potential linear muffin-tinorbital method using both the generalized gradient approximation and GGA pluson-site electron correlation effect GGA+U. In GGA, Ba2NRuO6 showshalf-metallic, semiconducting and metallic behavior for N = V, Cr, Fe,respectively, completely change to half-metallic when A2 = BaLa. While, GGA+Umethod yields clearly half-metallic in all compounds, except for Ba2FeRuO6,shows an insulating behavior. Also, the results of magnetic structurescalculations reveal that the A2NRuO6 compounds have ferrimagnetic nature if N =V and Cr, switch to ferromagnetic when N = Fe. The V3+, Cr3+, Fe3+ and Ru5+ions are in high spin magnetic moments states due to the antiferromagneticcoupling.

Electron doping and correlation effects on crystal, electronic and magnetic structures of A$_2$NRuO$_6$ (A2 = Ba$_2$, BaLa; N = V, Cr, Fe)