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- W4200501771 abstract "Spin-polarized currents play a key role in spintronics. Recently, it has been found that antiferromagnets with a non-spin-degenerate band structure can efficiently spin-polarize electric currents, even though their net magnetization is zero. Among the antiferromagnetic metals with magnetic space group symmetry supporting this functionality, the noncollinear antiferromagnetic antiperovskites $Amathrm{N}{mathrm{Mn}}_{3}$ ($A=mathrm{Ga}$, Ni, Sn, or Pt) are especially promising. This is due to their high N'eel temperatures and a good lattice match to perovskite oxide substrates, offering possibilities of high structural quality heterostructures based on these materials. Here, we investigate the spin polarization of antiferromagnetic $Amathrm{N}{mathrm{Mn}}_{3}$ metals using first-principles density functional theory calculations. We find that the spin polarization of the longitudinal currents in these materials is comparable with that in widely used ferromagnetic metals and thus can be exploited in magnetic tunnel junctions and spin transfer torque devices. Moreover, for certain film growth directions, out-of-plane transverse spin currents with a giant charge-to-spin conversion efficiency can be achieved, implying that the $Amathrm{N}{mathrm{Mn}}_{3}$ antiperovskites can be used as efficient spin sources. These properties make $Amathrm{N}{mathrm{Mn}}_{3}$ compounds promising for application in spintronics." @default.
- W4200501771 created "2021-12-31" @default.
- W4200501771 creator A5003784621 @default.
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- W4200501771 date "2021-12-17" @default.
- W4200501771 modified "2023-10-12" @default.
- W4200501771 title "Transport spin polarization of noncollinear antiferromagnetic antiperovskites" @default.
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- W4200501771 doi "https://doi.org/10.1103/physrevmaterials.5.124411" @default.
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