Document Type
Article
Source Publication Title
Applied Physics Letters
Abstract
We report a systematic study on rapid thermal annealing (RTA) of FePt nanoparticles. FePt particles with an average size of 8 nm were synthesized by a chemical solution method, and then annealed using RTA and conventional furnace annealing (FA). It was observed that FePt nanoparticles can be transformed from disordered A1 phase to ordered L10 phase at 650 °C for 10 s using RTA, which is much shorter than the time needed for FA. The transmission electron microscopy and x-ray diffraction studies have revealed that the particle agglomeration and grain growth in the RTA treated samples are much less than in the FA treated samples. A linear correlation between the coercivity and the square root of the treatment time √ t was observed in the RTA treated samples, which implies that the phase transition is related to atomic diffusion of Fe atoms from Fe-rich shells into the Pt-rich cores.
Disciplines
Physical Sciences and Mathematics | Physics
Publication Date
7-11-2008
Language
English
License
This work is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 4.0 International License.
Recommended Citation
Yano, Kazuaki; Nandwana, Vikas; Poudyal, Narayan; Rong, Chuan-Bing; and Liu, J. Ping, "Rapid thermal annealing of FePt nanoparticles" (2008). Physics Faculty Publications. 9.
https://mavmatrix.uta.edu/physics_facpubs/9