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Electrical transport properties in metal-insulating nanocomposite films

Authors Wong, Sai Kit
Issue Date 1998
Summary The DC resistivity, magnetoresistivity and Hall effect were studied in percolating nanostructured composites such as, NiFe-SiO2 films as a function of composition and temperature. A phenomenological model was proposed based on quantum size effect, to explain correlation between magnetoresistivity, Hall resistivity and resistivity. The impedance of granular co-sputtered films NiFe-SiO2, Au-SiO2 and Pt-SiO2 measured in the frequency range of 20Hz-1MHz. The results suggest that the effective dielectric constant is divergent at low frequency. In the proposed explanation, both polarization and tunneling between clusters of metal particles are taken into account.
Note Thesis (M.Phil.)--Hong Kong University of Science and Technology, 1998
Language English
Format Thesis
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