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Determination of the Complex Refractive Index of Nanoparticulate Magnetite from Optical Anisotropy Data for Magnetic Colloids

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Abstract—

Spectral dependences of birefringence and dichroism in magnetic colloids of magnetite nanoparticles have been studied. The results demonstrate that previously reported spectra of the refractive index of bulk magnetite are poorly suited for quantitative and qualitative interpretation of optical effects in magnetic fluids. Data on magneto-optical effects in magnetic colloids have been used to determine spectra of the real and imaginary parts of the refractive index of nanoparticulate magnetite in the wavelength range 400–1050 nm.

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ACKNOWLEDGMENTS

This study was carried out using equipment at the Shared Research Facilities Center, North-Caucasus Federal University, and was supported by the Russian Federation Ministry of Science and Higher Education (unique project identifier RF-2296.61321X0029, agreement no. 075-15-2021-687).

Funding

This work was supported by the Russian Federation Ministry of Science and Higher Education (state research target, project no. 0795-2020-007).

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  1. North-Caucasus Federal University, 355017, Stavropol, Russia

    K. V. Yerin

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Correspondence to K. V. Yerin.

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Translated by O. Tsarev

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Yerin, K.V. Determination of the Complex Refractive Index of Nanoparticulate Magnetite from Optical Anisotropy Data for Magnetic Colloids. Inorg Mater 58, 403–413 (2022). https://doi.org/10.1134/S0020168522040045

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  • DOI: https://doi.org/10.1134/S0020168522040045

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