Abstract
We have grown hematite (α − Fe 2 O 3) thin films on stainless steel and (001)-silicon single-crystal substrates by RF magnetron sputtering process in argon atmosphere at substrate temperatures from 400 to 800°C. Conversion Electron Mössbauer (CEM) spectra of the sample grown on stainless steel at 400°C exhibit values for hyperfine parameter characteristic of bulk hematite phase in the weak ferromagnetic state. Also, the relative line intensity ratio suggests that the magnetization vector of the polycrystalline film is aligned preferentially parallel to the surface. The X-ray diffraction (XRD) pattern of the polycrystalline thin film grown on steel substrates also corresponds to α − Fe 2O3. The samples were also analyzed by Atomic Force Microscopy (AFM), those grown on stainless steel reveal a morphology consisting of columnar grains with random orientation, given the inhomogeneity of the substrate surface.
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Uribe, J.D. et al. (2006). Hematite thin films: growth and characterization. In: Lippens, PE., Jumas, JC., Génin, JM.R. (eds) ICAME 2005. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-49853-7_109
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DOI: https://doi.org/10.1007/978-3-540-49853-7_109
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