Structural, magnetic, and electronic properties of equiatomic quaternary Heusler alloy CoRhTiAl

Abstract

We report the structural, magnetic and electronic properties of quaternary Heusler alloy CoRhTiAl. Room temperature XRD analysis reveals that the alloy crystallizes in B2-type structure instead of perfectly ordered Y-type structure due to 50 % disorder between the tetrahedral sites (Co and Rh) as well as octahedral sites (Ti and Al). The ab-initio simulations with GGA+U method predict a perfectly half-metallic ferrimagnetic nature with a gap in the minority spin-channel and thus, a high spin polarization.