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Articles you may be interested inOptical and magnetoresistive properties of polycrystalline La0.7Sr0.3MnO3 films on crystalline Al2O3 and Gd3Ga5O12 substrates Low Temp. Phys. 40, 756 (2014); 10.1063/1.4894318 Direct observation of magnetization reversal and low field magnetoresistance of epitaxial La0.7Sr0.3MnO3/SrTiO3 (001) thin films at room temperature Domain nucleation and growth of La 0.7 Ca 0.3 MnO 3−δ /LaAlO 3 films studied by low temperature magnetic force microscopy J. Appl. Phys. 93, 8319 (2003); 10.1063/1.1555315 Perpendicular magnetic anisotropy and magnetic domain structure in sputtered epitaxial FePt (001) L1 0 filmsWe report the magneto-optical ͑MO͒ properties of compressively strained La 0.7 Sr 0.3 MnO 3 ͑LSMO͒ thin films epitaxially grown on a LaAlO 3 substrate. The magnetic force microscope images show the stripe magnetic domains, characteristic of films with the perpendicular magnetic anisotropy ͑PMA͒. The optical reflectance and transmittance of the samples were measured over a broad energy range from the far infrared through the ultraviolet. To extract the optical constants of the films, we analyzed all of the layers of this thin-film structure using a Drude-Lorentz model. From the parameters obtained, we compute the optical constants, such as frequency-dependent optical conductivity and the diagonal components of the dielectric tensor. Moreover, the MO polar Kerr spectra of the samples were measured in an applied magnetic field of 1.5 T between 0.74 and 5.8 eV. The off-diagonal components of the dielectric tensor were then calculated by analyzing Kerr rotation, ellipticity, and the determined diagonal elements of the dielectric tensor. These functions yield information about the spin-dependent electronic structures of the LSMO thin films. We observed several MO-active transitions above 2 eV. These bands arise from the Mn-d͑t 2g ͒ to Mn-d͑e g ͒ in the majority-spin channel and the onset of O-2p to Mn-d͑e g ͒ and O-2p to Mn-d͑t 2g ͒ transitions in the minority-spin channel, in accord with the band-structure calculations. Most interestingly, their peak position and intensity are dependent on the film thickness, suggesting possible applications for tailoring MO responses in these PMA thin films.

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