The researchers combined magnetic method with Positron Annihilation spectroscopy to find out some relations between the atomic order and the ferromagnetics of the ordered Ni

3

Mn alloy. They observed that when s-parameter rise up after thichness reducing

the saturate magnetic induction Bs lowered down. But after a 40 minute re-ordering annealing

both s-parameter and Bs recovered qucikly to a certain extent. Based on these experiments

they strongly proposed that defects

such as dislocation and vacancy

influence seriously the Long Range Order Degree and sequentially the ferromagnetic response of the alloy. They also suggested that the recovery of the defects would be conductive to the ordering process. In addition

they indicated the existence of sub-structure

which would affect

in some way

the s-parameter.