Magnetic field effect on decomposition of Sm2Fe17N3 probed using 57Fe Mössbauer spectroscopy
摘要
In order to clarify the influence of the magnetic field on the thermal decomposition of Sm2Fe17N3 powder, we conducted a heat-treatment (HT) experiment in a vacuum of 38 Pa, at a temperature of 723 K, and in a magnetic field of zero and 5 T. Results of X-ray diffraction measurement, temperature dependence of magnetization and 57Fe Mössbauer spectroscopy experiments showed that fully-nitride Sm2Fe17N3 decomposes to nitrogen-poor Sm2Fe17Nx (0 < x < 3), α-Fe, Fe2O3 and Fe3O4. The magnetic field promoted the thermal decomposition of Sm2Fe17N3 in this HT condition.