ENHANCED MAGNETISM AND ITS CHARACTERISTICS OF NANOSTRUCTURED ALLOY NIAL

The magnetic properties of nanostructured NiAl (n-NiAl) were investiga ted at temperatures from 1.4 to 300K. The results indicated that as co mpared to polycrystalline NiAl, the magnetism of n- NiAl enhanced subs tantially, and became even stronger for the one with smaller grain siz e. At all the temperatures investigated n-NiAl exhibited paramagnetic behavior; no ferro- or antiferromagnetic transformation was observed. However, at low temperatures mictomagnetic and/or spin glass behavior (with T-f similar to 27K) was observed for the n-NiAl with both smalle r mean grain size (4.7nm) and microstrain (epsilon<0.01%). (C) 1997 Ac ta Metallurgica Inc.