Study of the structural properties at the LNLS in La0.75Sr0.25MnO3 /LaNiO3 Multilayers

J. CARLOS ROJAS SÁNCHEZ,MARA GRANADA, LAURA B. STEREN, IRINEU MAZZARO, DANTE H. MOSCA

Rio de Janeiro, Brasil

Workshop; Latinamerican Workshop on Magnetism, Magnetic Materials and their applications; 2007

LAWM

A study of the structural properties of La0.75Sr0.25MnO3LaNiO3  (LSMO/LNO) multilayers performed at the Brazilian synchrotron (LNLS) will be presented in this work. Samples were grown by dc sputtering on crystalline (100) SrTiO3 (STO) substrates. The superlattices consist on n bilayers LSMO/LNO being t1 and t2 the thicknesses of LSMO and LNO, respectively, [LSMOt1/LNOt2]n. The morphological and structural characterization of the samples will be performed by measured of the X-ray diffraction spectroscopy (XRD) and also by X-ray reflectivity. We found that the LSMO and LNO layers grow textured in the [100] direction. The roughness at the interfaces, the lattice parameters of the films and layer´s thicknesses (t1 and t2) of the superlattices, is determined by fitting the theta-2theta XRD patterns at high-angles considering the kinematical model. At low angles, measurements of the reflectivity allow us to determinate roughness at the interfaces and layer´s thicknesses by fitting the data considering the optical model.