Cubic MnSb: epitaxial growth of a predicted room temperature half-metal
  Epitaxial films including bulk-like cubic and wurtzite polymorphs of MnSb have been grown by molecular beam epitaxy on GaAs via careful control of the Sb4/Mn flux ratio. Nonzero-temperature density functional theory was used to predict ab initio the spin polarization as a function of reduced magnetization for the half-metals NiMnSb and cubic MnSb. In both cases, half-metallicity is lost at a threshold magnetization reduction, corresponding to a temperature T*< Tc. This threshold is far higher for cubic MnSb compared to NiMnSb and corresponds to T* > 350K, making epitaxial cubic MnSb a promising candidate for room temperature spin injection into semiconductors. 
James D. Aldous, Christopher W. Burrows, Ana M. S\'anchez, Richard   Beanland, Ian Maskery, Matthew K. Bradley, Manuel dos S...
cond-mat.mtrl-sci