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Optical and magneto-optical properties of Co-doped CeO2 films in the 0.5 to 4eV range
Authors: Veis Martin | Kučera M. | Zahradnik M. | Antoš Roman | Mistrík Jan | Bi Lei | Kim Hyun-Suk | Dionne G. F. | Ross C. A.
Year: 2014
Type of publication: článek v odborném periodiku
Name of source: Journal of Applied Physics
Publisher name: American Institute of Physics
Place: Melville
Page from-to: "17A940-1"-"17A940-3"
Titles:
Language Name Abstract Keywords
cze Optické a magneto-optické vlastnosti Co dopovaných tenkých vrstev CeO2 ve spektrálním oboru 0.5-4eV Určení optických konstant Co dopovaných tenkých vrstev CeO, připravenýcl laserovou ablaci. Dále pak studium spektrálních magneto-optických vlastností tohoto materiálu v závislosti na úrovni dopování. magneto-optická elipsometrie; optická elipsometrie; CeO2; dielektrická funkce; tenké vrstvy
eng Optical and magneto-optical properties of Co-doped CeO2 films in the 0.5 to 4eV range Magnetically doped Ce1xCoxO2d (nominal x 0.05 and 0.10) films were systematically studied by spectroscopic ellipsometry and magneto-optical spectroscopy. The samples were prepared by pulsed laser deposition on MgO(100) substrates and grew as textured polycrystalline films with thickness between 200 and 750 nm. They exhibited room temperature ferromagnetism and an out-of-plane easy axis attributed to magnetoelastic effects from the in-plane compressive strain. The dispersion of dielectric function of Ce1xCoxO2d films was parametrized by the sum of Tauc-Lorentz and damped Lorentz oscillators and adjusted numerically. Deduced optical band gaps were similar to those of pure CeO2, but the Co doping increased the optical absorption. The magneto-optical spectroscopy was carried out in both Faraday and Kerr configurations in the photon energy range from 0.5 to 4 eV, showing a strong dependence of the magneto-optical effect on the Co content near the optical band edge. magneto-optical spectroscopy; optical spectroscopic ellipsometry; CeO2; dielectric function; thin film; Co doping