Microstructure and Coercivity in High H_c Sm(Co, Cu, Fe, Zr)_(7.4) and Nd-Fe-B Alloys

1. Introduction So far the microstructure and coercivityof Sm(Co, Cu, Fe, Zr)_(7.4) alloy have beenstudied in detail by various authors. The effect of Zr-rich laminar phasestructure on the high coecivity of alloyis more attractive. The changes of magnetic