| Abstract: | Themagneticproperties of Sm2Fe17-xAlx(x=0,1,2,3)compoundsandtheirhydridesare systematically investigated. The results reveal that all compounds have the Th2Zn17-type structure. As the content of Al increases, the Curie temperature of Sm2(Fe, Al)17 compounds increases, and their saturation magnetization decreases. It is first discovered that the Curie temperatures of the hydrides of Sm2 (Fe, Al)17compounds measured from heating process are higher than those measured from cooling process, and their difference is denoted as △Tc* . The correlation between △Tc* and the structural stability of Sm2(Fe, Al)17 compounds as well as their corresponding hydrides is discussed. |
