Half-metallic ferromagnetism in equiatomic quaternary Heusler alloy CoRuMnSb

We study the structural, magnetic, and electronic properties of quaternary Heusler alloy CoRuMnSb. Room temperature XRD analysis reveals that the alloy crystallizes in a perfectly ordered Y-type structure. The experimental saturation magnetization value is in good agreement with the Slater-Pauling rule, indicating half-metallicity. The Curie temperature is found to be >400 K. The ab-initio simulations predict a perfectly half-metallic ferromagnetic nature with a gap in the minority spin-channel. Thus, ordered structure, integer moment, high Tc, half-metallic nature, and high spin-polarization make CoRuMnSb alloy a potential candidate for spintronic applications.