Investigation of microwave optical constants of bulk iron oxides

•Spectral reflectivities of magnetite and hematite in a wide frequency range (from extreme ultraviolet to microwave).•The analysis of microwave optical constants of iron oxides by means of the Kramers–Kronig method.•Approximation dependences of optical constants of magnetite and hematite in the micr...

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Bibliographic Details
Published in:Advances in space research 2018-11, Vol.62 (9), p.2692-2700
Main Authors: Tikhonov, V.V., Boyarskii, D.A., Polyakova, O.N.
Format: Article
Language:English
Subjects:
Complex index of refraction
Iron oxides
Kramers–Kronig method
Microwave range
Reflectivity
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Summary:•Spectral reflectivities of magnetite and hematite in a wide frequency range (from extreme ultraviolet to microwave).•The analysis of microwave optical constants of iron oxides by means of the Kramers–Kronig method.•Approximation dependences of optical constants of magnetite and hematite in the microwave range. The paper presents an analysis of microwave optical constants of iron oxides (magnetite and hematite) by means of the Kramers–Kronig method. Spectral reflectivities of magnetite and hematite in a wide frequency range (from extreme ultraviolet to microwave) were derived based on multiple experimental data found in the literature. The obtained dependencies were used to calculate optical constants of the minerals at 12–145 GHz and compare the results with other reported theoretical and laboratory studies.
ISSN:0273-1177
1879-1948
DOI:10.1016/j.asr.2018.07.014