Microstructure, Magnetic and Optical Properties of Metal/ Semiconductor Magnetic Granular Film

Bao Xin Huang

doi:10.4028/www.scientific.net/AMR.284-286.2207

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 284-286Microstructure, Magnetic and Optical Properties of...

Microstructure, Magnetic and Optical Properties of Metal/ Semiconductor Magnetic Granular Film

Abstract:

Fe/In₂O₃ magnetic granular films have been prepared by rf sputtering method. The results reveal that the nanometersized Fe particles uniformly dispersed in the amorphous matrix In₂O₃ for the as-deposited samples. At room temperature, the Fe_0.35/(In₂O₃)_0.65film shows a superparamagnetic behavior. The average diameter of particles (d = 5 nm) estimated from the fitting values of the saturation magnetization of Fe particles M_Fe and magnetic moment m is fitted well with that observed by TEM. The spectra analyses indicate that the indirect photon transitions of granular Fe_x/ (In₂O₃)_1-x films substitute for the direct photon transition of In₂O₃film in the absorption process. The band gaps of magnetic granular films decrease monotonously with the increase of volume fraction of Fe particles in the magnetic granular films, and the tail width of localized states becomes wider in concentration range of Fe studied.

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Advanced Materials Research (Volumes 284-286)

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2207-2210

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https://doi.org/10.4028/www.scientific.net/AMR.284-286.2207

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July 2011

Authors:

Bao Xin Huang

Keywords:

Indirect Transition, Magnetic Granular Film, Superparamagnetism

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