Disorder-mediated quenching of magnetization in NbVTiAl: Theory and experiment

In this paper, we present the structural, electronic, magnetic and transport properties of a equiatomic quaternary alloy NbVTiAl. The absence (111) (200) peaks in X-ray diffraction (XRD) data confirms A2-type structure. Magnetization measurements indicate high Curie temperature negligibly small moment ($\sim 10^{-3} \mu_B/f.u.$) These observations are indicative fully compensated ferrimagnetism alloy. Temperature-dependent resistivity indicates metallic nature. Ab-initio calculation ordered NbVTiAl structure nearly half behavior with spin polarization ($\sim$ 90 \%) net 0.8 $\mu_B/f.u.$ (in complete contrast to experimental observation). One main objective paper is resolve explain long-standing discrepancy between theoretical prediction observation magnetization for V-based Heusler alloys, general. To gain an in-depth understanding, modelled various disordered states its subsequent effect on electronic properties. attributed A2 disorder system, as confirmed by our XRD data. presence also causes emergence finite at Fermi level, which impacts system.