Synthesis and structural study of L10-FePt nanoparticles

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Turkish Journal of Engineering and Environmental Sciences
Volume:34 Issue:4
Synthesis and structural study of L10-FePt nanoparticles

Synthesis and structural study of L10-FePt nanoparticles

Pages : 265-270

View : 10 | Download : 9

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :A comparison of the synthesis and structural properties of magnetic FePt nanostructures is presented. The FePt nanoparticle system is an excellent candidate for ultrahigh-density magnetic recording. Monodisperse FePt nanoparticles were synthesized by the superhydride method. The composition of nanocrystals was determined by energy dispersive spectroscopy insert ignore into journalissuearticles values(EDS);. Transmission electron microscopy insert ignore into journalissuearticles values(TEM); images showed monosized FePt nanoparticles with a diameter of 3.5 nm. The average distance between the monodisperse particles was nearly 2 nm. In order to determine the stability of nanoparticle colloidal solution, a measure of stability was defined via spectrophotometric analysis. The magnetic measurement showed that as-made FePt was first superparamagnetic at room temperature; after annealing at 600 °C for 4 h, the nanoparticles gained the ability to phase transition to L10-FePt, and the coercivity of the nanocrystals was raised to 6.5 kOe.
Keywords : L10 phase, FePt nanoparticles, superparamagnetism, coercivity, nanocrystals

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