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Cationic Diffusion in La2/3Ca1/3MnO3 Thin Films Grown on LaAlO3 (001) Substrates. Estradé Albiol, Sònia Arbiol i Cobos, Jordi Peiró Martínez, Francisca Abad, Llibertat Laukhin, Vladimir Balcells i Argemí, Lluís Martínez Perea, Benjamin Pel·lícules fines Cations Propietats magnètiques Thin films Cations Magnetic properties Microstructural features of La2/3Ca1/3MnO3 layers of various thicknesses grown on top of 001 LaAlO3 substrates are studied by using transmission electron microscopy and electron energy loss spectroscopy. Films are of high microstructural quality but exhibit some structural relaxation and mosaicity both when increasing thickness or after annealing processes. The existence of a cationic segregation process of La atoms toward free surface has been detected, as well as a Mn oxidation state variation through layer thickness. La diffusion would lead to a Mn valence change and, in turn, to reduced magnetization. 2012-08-30T11:34:56Z 2012-08-30T11:34:56Z 2007 2012-08-30T11:34:56Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: http://dx.doi.org/10.1063/1.2799740 Applied Physics Letters, 2007, vol. 91, p. 252503-1-252503-3 http://dx.doi.org/10.1063/1.2799740 (c) American Institute of Physics , 2007 info:eu-repo/semantics/openAccess American Institute of Physics Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)