Title :
X-ray scattering and absorption spectroscopy study of the order-disorder transition of (FePt)1-xCux nanoparticles
Author :
Huang, Tzu-Wen ; Tu, Te-Horn ; Huang, Yen-Heng ; Lee, Chih-Hao ; Lin, Chih-Ming
Author_Institution :
Dept. of Eng. & Syst. Sci., Nat. Tsing Hua Univ., Hsinchu, Taiwan
Abstract :
(FePt)1-xCux nanoparticles were prepared by the simultaneous polyol reduction of platinum acetylacetonate and copper acetylacetonate, and the thermal decomposition of Fe carbonyl. The addition of copper reduces the transition temperature of disordered fcc structure to ordered L10 by about 50°C-100°C. Together with the X-ray powder diffraction (XRD) and X-ray absorption spectroscopy (XAS) results, the structure of FePtCu ternary alloy was verified and the Fe site was replaced by Cu.
Keywords :
X-ray absorption spectra; X-ray diffraction; X-ray scattering; copper alloys; iron alloys; magnetic particles; nanoparticles; order-disorder transformations; platinum alloys; Fe carbonyl; FePtCu; X-ray absorption spectroscopy; X-ray powder diffraction; X-ray scattering; copper acetylacetonate; hard magnetic materials; magnetic recording; nanoparticle synthesis; order-disorder transition; platinum acetylacetonate; polyol reduction; ternary alloy; thermal decomposition; Copper; Electromagnetic wave absorption; Iron; Nanoparticles; Platinum; Powders; Spectroscopy; Temperature; Thermal decomposition; X-ray scattering; FePt; X-ray absorption spectroscopy; X-ray scattering; hard magnetic materials; magnetic recording; nanoparticle synthesis;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2004.842129
