Chemical synthesis of L10 Fe-Pt-Ni alloy nanoparticles

• Published in: AIP advances Vol. 8; no. 5
• Main Authors: Deepchand, Vimal, Abel, Frank M., Tzitzios, Vasileios, Hadjipanayis, George C.
• Format: Journal Article
• Language: English
• Published: United States American Institute of Physics (AIP) 22-12-2017
• Subjects: MATERIALS SCIENCE
• ISSN: 2158-3226; 2158-3226

This work focuses on the study of the magnetic and structural properties of chemically synthesized FePt1-xNix nanoparticles, with Ni content x in the range 0.2-0.4. We report the effect of Ni substitution on the L10 structure, on both the as-synthesized and annealed nanoparticles. A decrease in nanoparticle size as well as in chemical order is observed with an increase in Ni content, for both the as-made and annealed nanoparticles. The results also show that the post annealing procedure at 700oC significantly enhanced the L10 ordering of the nanoparticles. Substitution of nickel leads to a decrease in coercivity from 14.9 kOe in FePt to 0.8 kOe for FePt0.6Ni0.4 alloy, while the magnetization at 3 T is increased from 48 emu/g to 88 emu/g.