Prediction of fully compensated ferrimagnetic spin-gapless semiconducting FeMnGa/Al/In half Heusler alloys

IUCrJ

Liu, Z.H.¹  Zhang, Y.J.² 

[1]Department of Physics, University of Science and Technology Beijing, Beijing 100083, People's Republic of China

[2]School of Civil Engineering, Guangzhou University, Guangzhou 510006, People's Republic of China

关键词: FEMNGA;    HEUSLER ALLOYS;    HALF-METALLIC FULLY COMPENSATED FERRIMAGNETS;    SPIN-GAPLESS SEMICONDUCTORS;    FEMN-BASED;    FULL SPIN POLARIZATION;    MAGNETIC INVERSION SYMMETRY;   

DOI  :  10.1107/S2052252519005062

学科分类：数学（综合）

来源: International Union of Crystallography

【 摘 要 】

Materials with full spin polarization that exhibit zero net magnetization attract great scientific interest because of their potential applications in spintronics. Here, the structural, magnetic and electronic properties of a C1b-ordered FeMnGa alloy are reported using first-principles calculations. The results indicate that the corresponding band structure exhibits a considerable gap in one of the spin channels and a zero gap in the other thus allowing for high mobility of fully spin-polarized carriers. The localized magnetic moments of Fe and Mn atoms have an antiparallel arrangement leading to fully compensated ferrimagnetism, which possesses broken magnetic inversion symmetry. Such magnetic systems do not produce dipole fields and are extremely stable against external magnetic fields. Therefore, this will improve the performance of spintronic devices. Using this principle, similar band dispersion and compensated magnetic moments were predicted in a C1b-ordered FeMnAl0.5In0.5 Heusler alloy.

【 授权许可】

CC BY