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Title: Effects of thickness on the cation segregation in epitaxial (001) and (110) La2/3Ca1/3MnO3 thin films
Author: Estradé Albiol, Sònia
Rebled, J. M. (José Manuel)
Arbiol i Cobos, Jordi
Peiró Martínez, Francisca
Infante, I. C.
Herranz Casabona, Gervasi
Sánchez, F.
Fontcuberta i Griñó, Josep
Córdoba, R.
Mendis, B. G.
Bleloch, A. L.
Keywords: Cations
Pel·lícules fines
Espectroscòpia de pèrdua d'energia d'electrons
Thin films
Electron energy loss spectroscopy
Issue Date: 2009
Publisher: American Institute of Physics
Abstract: Electron-energy-loss spectroscopy is used to map composition and electronic states in epitaxial La2/3Ca1/3MnO3 LCMO films of various thicknesses grown on SrTiO3 001 and 110 substrates. For relatively thick films 20 nm , epitaxial tensile strain in 001 films promotes a compositional La/Ca gradient across the film thickness, being the interface La rich, while the relaxed 110 films are chemically homogeneous. In contrast, much thinner 001 and 110 LCMO films display a different La/Ca distribution, being La rich at the free surface. The observed distinct thickness-dependent composition gradient behavior reflects a balance between strain-induced elastic energy minimization and kinetic effects during growth.
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It is part of: Applied Physics Letters, 2009, vol. 95, p. 072507-1-072507-3
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ISSN: 0003-6951
Appears in Collections:Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)

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