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The most important magnetic characteristics of R2Fe17 compounds have drawbacks, that is why they can not be considered as high-energy permanent magnet materials. However recent studies have shown it is possible to improve their major magnetic properties. In this work (Sm, R)2(Fe, T)17 alloys, where R = Ho, Er; T = Al, V and hydrides, nitrides based on them and the magnetic properties of these materials are studied. X-ray fluorescence analyze, X-ray powder diffraction, SEM and measurements of magnetization curves were used for the investigation of synthesized samples.