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

Published online by Cambridge University Press:  24 June 2006

H. Wang ,
F. J. Yang ,
H. B. Wang ,
S. X. Xue ,
Y. Gao ,
Z. B. Huang ,
C. P. Yang ,
M. F. Chiah ,
N. Ke  and
W. Y. Cheung
...Show all authors
H. Wang*
Affiliation:
Faculty of Physics and Electronic Technology and Nanotechnology Research Centre, Hubei University, Wuhan 430062, China
F. J. Yang
Affiliation:
Faculty of Physics and Electronic Technology and Nanotechnology Research Centre, Hubei University, Wuhan 430062, China
H. B. Wang
Affiliation:
Faculty of Physics and Electronic Technology and Nanotechnology Research Centre, Hubei University, Wuhan 430062, China
S. X. Xue
Affiliation:
Faculty of Physics and Electronic Technology and Nanotechnology Research Centre, Hubei University, Wuhan 430062, China
Y. Gao
Affiliation:
Faculty of Physics and Electronic Technology and Nanotechnology Research Centre, Hubei University, Wuhan 430062, China
Z. B. Huang
Affiliation:
Faculty of Physics and Electronic Technology and Nanotechnology Research Centre, Hubei University, Wuhan 430062, China
C. P. Yang
Affiliation:
Faculty of Physics and Electronic Technology and Nanotechnology Research Centre, Hubei University, Wuhan 430062, China
M. F. Chiah
Affiliation:
Department of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong
N. Ke
Affiliation:
Department of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong
W. Y. Cheung
Affiliation:
Department of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong
S. P. Wong
Affiliation:
Department of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong
Q. Li
Affiliation:
Department of Physics, The Chinese University of Hong Kong, Hong Kong
*
[email protected]
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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.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 34 , Issue 3 , June 2006 , pp. 205 - 208
Copyright
© EDP Sciences, 2006

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