Advances in Processing, Manufacturing, and Applications of Magnetic Materials

Donghui Liu et al., in "Preparation and Magnetic Properties of 2:17-type SmCo Alloy by Transition Metal-induced Calciothermic Reduction," describe a single-step method for producing an alloy based on the Sm2Co17 structure produced through a singlestep calciothermic reaction where the resulting alloy is an admixture of the SmCo7 and Sm2Co17 phases. In "Unraveling Site Selective Magnetic Properties of Cobalt Sites in Critical Elements Lean RE(TM)5 Magnet Materials," the authors report on two compounds, CeCo2Fe3N2 and LaCo2Fe3N2, that were proposed to have sufficient magnetic hardness for permanent magnet development. The ability to operate at higher frequencies enables higher speed motors (30-1000 kRPM), which leads to increased power densities and miniaturization providing opportunities for reduced material intensity as well as improved energy efficiency.