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Characterization of CoPt-C and FePt-C Nanocomposite Films Prepared by Pulsed Filtered Vacuum Arc Deposition

Published online by Cambridge University Press:  01 February 2011

M.F. Chiah ,
H. Wang ,
P. Chen ,
C.Y. Poon ,
W.Y. Cheung  and
S.P. Wong
M.F. Chiah
Affiliation:
Department of Electronic Engineering and Materials Science and Technology Research Center, The Chinese University of Hong Kong, N.T., Hong Kong, China
H. Wang
Affiliation:
Department of Electronic Engineering and Materials Science and Technology Research Center, The Chinese University of Hong Kong, N.T., Hong Kong, China
P. Chen
Affiliation:
Department of Electronic Engineering and Materials Science and Technology Research Center, The Chinese University of Hong Kong, N.T., Hong Kong, China
C.Y. Poon
Affiliation:
Department of Electronic Engineering and Materials Science and Technology Research Center, The Chinese University of Hong Kong, N.T., Hong Kong, China
W.Y. Cheung
Affiliation:
Department of Electronic Engineering and Materials Science and Technology Research Center, The Chinese University of Hong Kong, N.T., Hong Kong, China
S.P. Wong
Affiliation:
Department of Electronic Engineering and Materials Science and Technology Research Center, The Chinese University of Hong Kong, N.T., Hong Kong, China
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Abstract

CoPt-C and FePt-C nanocomposite thin films were prepared by a pulsed filtered vacuum arc deposition technique. Thermal annealing was performed in vacuum at various temperatures. The dependence of the magnetic properties on the carbon fraction and annealing temperature was studied. Both x-ray diffraction and magnetic force microscopy analyses confirmed the formation of nano-crystallites of face-centered-tetragonal phase of CoPt or FePt in the carbon matrix after annealing at a sufficiently high temperature. For the film with a particular composition of Fe43Pt35C22, the coercivity and the grain size were observed to increase with increasing annealing temperature, up to a value of 3.5 kOe at an annealing temperature of 650°C, and with a grain size about 10.5 nm.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 721: Symposia E/J – Texture and Microstructure in Electronic and Magnetic Films – Nanostructural Magnetic Materials for Data Storage , 2002 , E3.4
Copyright
Copyright © Materials Research Society 2002

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