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Magneto-optical spectroscopy of LSTO Films grown by pulsed laser deposition onto (100) and (110) STO substrates
Authors: Veis M | Mistrík Jan
Year: 2007
Type of publication: ostatní - přednáška nebo poster
Page from-to: nestránkováno
Titles:
Language Name Abstract Keywords
cze Magneto-optické studium LSMO vrstev připravených laserovou ablací na STO substratech s krzstalovou orientacií (110) a (100). Magneto-optické studium LSMO Vrstvy připravené laserovou ablací na STO substratech s krzstalovou orientacií (110) a (100) byly zkoumány magneto-optickými metodami.
eng Magneto-optical spectroscopy of LSTO Films grown by pulsed laser deposition onto (100) and (110) STO substrates Magneto-optical (MO) spectroscopy combined with spectroscopic ellipsometry (SE) has been used to learn on the electronic transitions in La2/3Sr1/3MnO3 films pulse laser deposited onto SrTiO3 (100) substrates. Dispersion function of LSMO films was parameterized by the sum of three damped Lorentz oscillators and adjusted together with the film thickness numerically. With the knowledge of film optical properties the off-diagonal elements of the LSMO permittivity tensor (magneto-optical constants) were calculated from the complex polar Kerr effect measured on the thickest (60nm) LSMO film (considered as optically thick). The considered approximation as well as the reliability of the obtained optical and MO constants was verified by the consistence of calculated and experimental MO spectra for the thinner LSMO films (where the propagation effect play an important role). The resolved electronic transition centered at about 4 eV features the spectral dependences of diagonal and off-diagonal elements of LSMO permittivity in the studied spectral range. In the molecular orbital picture this could be assigned to the charge transfer electronic transition from the O 2p states to the Mn 3d t2g states, split by the spin-orbit interaction. magneto-optical spectroscopy;LSTO Films;pulsed laser deposition

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