Eur. Phys. J. Appl. Phys. 34, 205-208 (2006)
https://doi.org/10.1051/epjap:2006057

Microstructure and magnetic properties of FePt:C nanocomposite films with low ordering temperature

¹ Faculty of Physics and Electronic Technology and Nanotechnology Research Centre, Hubei University, Wuhan 430062, China
² Department of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong
³ Department of Physics, The Chinese University of Hong Kong, Hong Kong

Corresponding author: nanoguy@126.com

Received: 9 December 2005
Accepted: 24 March 2006
Published online: 24 June 2006

Abstract

FePt:C films were prepared by filtered vacuum arc deposition. A strong dependence of coercivity and ordering of the face-central tetragonal structure on both C concentration and annealing temperature was observed. With C concentration of 21%, the sample with a coercivity of 5.7 kOe was obtained when annealing temperature was only 350 °C. Transmission electron microscope observations revealed that FePt grains with an average size of 4.1 nm were embedded in C and appeared to be well isolated.