Mössbauer investigation of Fe-Ni fine particles

Fine particles about 20 nm in average diameter of Fe_1-xNi _x (x=0.10-0.85) alloys prepared by evaporation in nitrogen atmosphere were studied using Mössbauer technique, x-ray diffraction, and magnetic measurement. Their different phases were identified, and their hyperfine field distribution, specific saturation magnetization, remnant magnetization, and coercivity were determined. The fine particles show some properties, which are sensitive to the Ni content x and different from those of corresponding bulk alloys. The results suggest that the fine particles may be useful from an applied viewpoint.