Magnetic structure of an Fe–Pd–Rh alloy.

Martensitic phase transition in an aged Fe–Pd–Rh alloy was studied using transmission electron microscopy (TEM) and x-ray diffraction. Both TEM and x-ray diffraction reveal the appearance of an intermediate structure between the fcc→L10 martensitic transformation. The intermediate phase, denoted L1m, has a monoclinic structure with lattice parameters of a=3.193 Å, b=3.684 Å, c=3.141 Å, and β=92.042°, and the normal L10 martensitic phase has an ordered structure with lattice parameters of a=3.876 Å, c=3.684 Å, and c/a=0.950, as confirmed by TEM and x-ray diffraction. [ABSTRACT FROM AUTHOR]