The microstructures and magnetic properties of two in-situ composites, dire
ctionally solidified Sb-9.5%Mn and Sb-50%Mn alloys, were investigated. The
aligned ferromagnetic compound MnSb or Mn2Sb was embedded in Sb or Mn matri
x with varying Mn content. The magnetization curves and thermal magnetic cu
rves were examined along solidification direction, which reveals the magnet
ic behaviors of the composites.