Abstract
We report the growth of single-phase, stoichiometric polycrystalline thin films of the half-Heusler ferromagnet NiMnSb, predicted to be half-metallic, on single crystal InSb (100) substrates heated at 200°C by pulsed laser deposition. The films exhibit saturation magnetization of 4μB∕formula unit at 5K and coercive fields of 2Oe at 300K indicative of their good structural quality. At low temperatures (T<200K) the system behaves like a Heisenberg ferromagnet as expected for a half-metal, while at T>200K it behaves like an itinerant ferromagnet. The resistivity of the film at 5K is 6μΩcm.
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