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Structural and Magnetic Properties of FePt-C Nanocomposite Films |
| WANG Hao1;YANG Fu-Jun1;CHEN Kan-Song1;ZHOU Bin1;ZHANG Yuan-Wei1;GU Hao-Shuang1;CHIAH M. F.2;CHEUNG W. Y.2;WONG S. P2 |
| 1Faculty of Physics and Electronic Technology, Hubei University, Wuhan 430062
2Department of Electronic Engineering and Materials Science and Technology Research Centre, The Chinese University of Hong Kong, Hong Kong |
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| Cite this article: |
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WANG Hao, YANG Fu-Jun, CHEN Kan-Song et al 2004 Chin. Phys. Lett. 21 949-951 |
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Abstract Nanocomposite FePt-C thin films were prepared by a pulsed filtered vacuum arc deposition technique. The films were characterized by non-Rutherford backscattering spectrometry, x-ray diffraction, and magnetic force microscopy. The dependence of magnetic properties against annealing temperature was studied by using a vibrating sample magnetometer. Both x-ray diffraction and magnetic force microscopy analyses confirmed the formation of nano-crystallites of face-centred-tetragonal phase of FePt in the carbon matrix after annealing at a sufficiently high temperature. For the film with a composition of (Fe0.55Pt0.45)0.78C0.22, 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.
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| Keywords:
75.70.Ak
75.50.Ss
75.70.Kw
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Published: 01 May 2004
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| PACS: |
75.70.Ak
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(Magnetic properties of monolayers and thin films)
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75.50.Ss
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(Magnetic recording materials)
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75.70.Kw
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(Domain structure (including magnetic bubbles and vortices))
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