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Magnetically Soft Co-C Granular-like Amorphous Thin Films With High Resistivity and High Saturation Flux Density

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Abstract

Granular-like amorphous CoxC1-x nanocomposite thin films, with x in the range of 60-75% in atomic percentage, have been prepared by pulsed filtered vacuum arc deposition. The structures of the films were characterized by non-Rutherford backscattering spectrometry, transmission electron microscopy, x-ray diffraction, x-ray photoelectron spectroscopy, and Raman spectroscopy. The in-plane magnetic hysteresis loops were measured by a superconducting quantum interference device magnetometer at room temperature. The electrical transport properties were measured by the four-probe technique at various temperatures ranging from 20 to 300 K. The films were found to be magnetically soft with coercivities in the range of 2 to 12 Oe, resistivities in the range of 130 to 300 μΩcm, and magnetic saturation flux densities in the range of 6 to 13 kG. The films also showed good thermal stability in their structural, electrical and magnetic properties upon annealing up to 200°C in a vacuum furnace.

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Authors and Affiliations

  1. Department of Electronic Engineering and Materials Science and Technology Research Center, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, P.R. China

    H. Wang, S. P. Wong, M. F. Chiah, W. Q. Li, C. Y. Poon, W. Y. Cheung & N. Ke

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  1. H. Wang
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  2. S. P. Wong
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  3. M. F. Chiah
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  4. W. Q. Li
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  5. C. Y. Poon
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  6. W. Y. Cheung
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  7. N. Ke
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Wang, H., Wong, S.P., Chiah, M.F. et al. Magnetically Soft Co-C Granular-like Amorphous Thin Films With High Resistivity and High Saturation Flux Density. MRS Online Proceedings Library 721, 64 (2002). https://doi.org/10.1557/PROC-721-E6.4

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  • DOI: https://doi.org/10.1557/PROC-721-E6.4

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