The effect of milling conditions on the magnetic and topological ...
Material. MgB 2 bulk samples were prepared by prealloying magnesium and amorphous boron powders in a mill, compacting by cold pressing, and then sintering in a tube furnace under an ultrahigh purity inert atmosphere. Magnesium ( wt% purity, less than 45 μm particle size, Alfa Aesar) and amorphous boron (95 wt% purity, 1 μm particle size, SigmaAldrich) powders were mixed in a SPEX 8000 ...