Tuning Fermi level within half-metallic gap in Co-based Heusler alloys

Epitaxial Heusler superlattice Co2MnAl/Fe2MnAl with perpendicular magnetic anisotropy and termination-dependent half-metallicity

“…Pure FMA films and FMA terminated [FMA n /CMA n ] q had low spin polarization near the Fermi level, P (E f ) = 25%, which contradicts predictions of half-metallicity for this system [20][21][22][23]. Pure CMA had relatively high P (E f ) = 65%, which falls short of predictions of half-metallicity for CMA [24][25][26], but corroborates claims of near halfmetallicity with Fermi level position at the bottom of the Slater-Pauling spin gap [27][28][29][30].…”

Electronic structure and magnetic properties of quaternary Heusler alloy Co2CrGa1−Ge (x=0−1)

“…The studies of phase equilibrium in Co 2 CrGa and Co 2 Cr 1 À x Fe x Ga (x ¼0 À 1) system show the high stability of L2 1 phase and a higher Curie temperature than Co 2 CrAl and Co 2 Cr 1 À x Fe x Al [18,19]. In particular, bulk Co 2 CrGa has the saturation magnetic moment of moment variation and shifting the position of Fermi level in the band gap can be achieved through substitution of transition metals and main group element in place of constituent Y and Z atoms respectively [21][22][23][24][25][26]. Wu et al [22] have studied the effect of Nb doping on electronic and magnetic properties of halfmetallic CoMnSb semi-Heusler compound from first-principles calculations.…”

“…Wu et al [22] have studied the effect of Nb doping on electronic and magnetic properties of halfmetallic CoMnSb semi-Heusler compound from first-principles calculations. Nakatani [26]. Therefore, keeping in view these findings and important applications of Co-based compounds, we intend to study effect of substitution of main group element on electronic and magnetic properties.…”