The Structure and Magnetic Properties of (Sm,Er)-Fe-N Powders Prepared by Ball Milling

Abstract

Nitrides of ‘2:17’ - type based on rare earth metals and iron are of interest as promising magnetic materials for the development of high-energy permanent magnets. The magnetic properties and phase composition of the starting compound Sm1.8Er0.2Fe17, nitride Sm1.8Er0.2Fe17N2.1 and its crushed powders have been investigated. The magnetic measurements of the samples were studied in magnetic fields up to 70 kOe at room temperature. It was found that the introduction of nitrogen atoms into the crystal lattice of the substituted composition (Sm,Er)2Fe17 in combination with the effect of high-energy milling of nitride leads to an increase in the saturation magnetization (σS) and coercive force (HC).