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Title: Cationic and charge segregation in La2/3Ca1/3MnO3 thin films grown on (001) and (110) SrTiO3.
Author: Estradé Albiol, Sònia
Arbiol i Cobos, Jordi
Peiró Martínez, Francisca
Infante, I. C.
Sánchez Barrera, Florencio
Fontcuberta i Griñó, Josep
Peña, F. de la
Walls, M.
Colliex, C.
Keywords: Propietats magnètiques
Pel·lícules fines
Espectroscòpia de pèrdua d'energia d'electrons
Magnetic properties
Thin films
Electron energy loss spectroscopy
Issue Date: 2008
Publisher: American Institute of Physics
Abstract: Electron energy-loss spectroscopy is used to map composition and electronic states in epitaxial La2/3Ca1/3MnO3 films grown on SrTiO3 001 and 110 substrates. It is found that in partially relaxed 110 films cationic composition and valence state of Mn3+/4+ ions are preserved across the film thickness. In contrast, in fully strained 001 films, the Ca/La ratio gradually changes across the film, being La rich at film/substrate interface and La depleted at free surface; Mn valence state changes accordingly. These observations suggest that a strongly orientation-dependent adaptative composition mechanism dominates stress accommodation in manganite films and provides microscopic understanding of their dissimilar magnetic properties.
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It is part of: Applied Physics Letters, 2008, vol. 93, num. 3, p. 112505-1-112505-3
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ISSN: 0003-6951
Appears in Collections:Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)

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