Highly spin-polarized electronic structure and magnetic properties of Mn_2.25Co_0.75Al_1-x Ge _x Heusler alloys: first-principles calculations.

ABSTRACT: Highly spin-polarized half-metals (HMs) and spin-gapless semiconductors (SGSs) are the promising candidates in spintronic devices. However, the HM and SGS Heusler materials are very sensitive to the stoichiometric defects and lattice distortion, which will be not beneficial to the practical applications. Here, the electronic structure and magnetic properties of Mn_2.25Co_0.75Al_1-x Ge _x (x = 0, 0.25, 0.50, 0.75 and 1.00) Heusler alloys were investigated by first-principles calculations. Large negative formation energy, cohesive energy and phonon spectra confirm that the Mn_2.25Co_0.75Al_1-x Ge _x alloys are stable. It is found that Mn_2.25Co_0.75Al_1-<

SUBMITTER: Wang Y 

PROVIDER: S-EPMC9054682 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature