Curie temperatures of Sm2Fe17Nx (0<x<3) of intermediate nitrogen concentrations

For the investigation of the relationship between the Curie temperatures (Ta) and nitrogen contents (x) in the intermediate nitrogen content samples of Sm2Fe17Nx (0 < x < 3), the newly developed two-step reaction of that in pure N2 gas followed by the annealing in Ar with dilute N2 (PN2 < 1 Pa) gas atmosphere was employed. The TT in the samples were measured with VSM, and the nitrogen contents in the sample particles were directly detected using EPMA and MFM. After the adequate treatments of the data, the volume fraction of a region having a certain TT value and that having a certain nitrogen content (x) can be calculated. As conclusion, the relation between the TT and the x value was determined.