Optical properties of Fe{sub 1{minus}x}Si{sub x} alloys (x{bold {le}}0.1) studied by spectroscopic ellipsometry

Journal Article · Wed Oct 01 04:00:00 EDT 1997 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.365756· OSTI ID:542567

Kim, K J; Kang, J H; Bahng, J H; Lee, M H ^[1]; Lynch, D W ^[2]

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1. Department of Physics, Kon-Kuk University, Seoul 143-701 (Korea)
2. Department of Physics and Ames Laboratory, Iowa State University, Ames, Iowa 50011 (United States)

Optical properties of dilute Fe{sub 1{minus}x}Si{sub x} (x{le}0.1) alloys were studied by spectroscopic ellipsometry in the 1.5{endash}6 eV photon energy region. The absorption strength of the alloys is found to decrease in the entire energy region as the Si composition increases. The interband-transition edges of Fe at about 2.5 eV in the minority-spin bands and at about 5 eV in the majority-spin bands shift to lower energies as the Si composition increases. The decrease in the absorption strength is interpreted as due to a decrease in the density of states of the Fe host and also due to a reduction of conduction-electron concentration in the alloys. The shifts of the 2.5 and 5 eV interband-transition edges can be explained in terms of a perturbative variation in the band structure of Fe induced by its alloying with Si. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 542567
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 82; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTRA
DILUTE ALLOYS
ELECTRONIC STRUCTURE
ELLIPSOMETRY
ENERGY-LEVEL TRANSITIONS
IRON ALLOYS
OPTICAL PROPERTIES
SILICON ALLOYS
VISIBLE SPECTRA