![Sample our Engineering & Technology journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5933/TOC-Subject-Sample-2021-Engineering-Tech.jpg"})
Abstract
Thin films of FePt nanoparticles were prepared by co-deposition of Fe and Pt on to amorphous C films kept at 350°C. As-prepared films were composed of disordered Fe–Pt nanoparticles with a fcc structure, where twinned and multiply twinned Fe–Pt nanoparticles could be identified by transmission electron microscopy (TEM) and electron diffraction. Atomic ordering from fcc to L10 structure was followed by in-situ TEM observation during heating up to 750°C. Multiply twinned (fivefold) nanoparticles of the L10 FePt were observed for the first time by high-resolution TEM observation. In these nanoparticles the crystallographic c axes of L10 structure is oriented parallel to the film plane in each segment. The stability of the fivefold FePt nanoparticles is briefly discussed.
Acknowledgements
This work was supported by Cooperative Science Program 57 of the Hungarian Academy of Sciences–Japan Society for the Promotion of Sciences, by the Hungarian National Research Foundation (OTKA T030432 and T033075) and by the EU under contract ICAI-CT-2000-70029. The authors wish to thank T. Szuts for his help in this research.