Cubic MnSb: Epitaxial growth of a predicted room temperature half-metal

Article

关键词: MOLECULAR-BEAM EPITAXY;    SPIN;    NIMNSB;    PHOTOEMISSION;    FERROMAGNETS;    POLARIZATION;    INTERFACE;    SURFACE;    ALLOYS;    STATES;   

DOI  :  10.1103/PhysRevB.85.060403

来源: SCIE

【 摘 要 】

Epitaxial films including bulklike cubic and wurtzite polymorphs of MnSb have been grown by molecular beam epitaxy on GaAs via careful control of the Sb-4/Mn flux ratio. Nonzero-temperature density functional theory was used to predict ab initio the half-metallicity of the cubic polymorph and compare its spin polarization as a function of reduced magnetization with that of the well known half-metal NiMnSb. In both cases, half-metallicity is lost at a threshold magnetization reduction, corresponding to a temperature T* < T-C. This threshold is far higher for cubic MnSb compared to NiMnSb and corresponds to T* > 350 K, making epitaxial cubic MnSb a promising candidate for efficient room temperature spin injection into semiconductors.

【 授权许可】

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