Abstract
An attempt to prepare high-quality single crystals of NiMnSb is reported. A high-quality polycrystal, used as a starting material of single-crystal growth, was prepared from the stoichiometric nominal composition. Large single crystals were grown using the Bridgman method with a sealed Mo crucible. Annealing under ultra high vacuum (ca. 10-10 Torr) improves the quality of the single crystal. The resultant single crystals exhibit no anomaly suggesting a magnetic transition in transport properties below room temperature.