Title:
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Cationic and charge segregation in La2/3Ca1/3MnO3 thin films grown on (001) and (110) SrTiO3.
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Author:
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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.
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Other authors:
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Universitat de Barcelona |
Abstract:
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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. |
Subject(s):
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-Propietats magnètiques -Pel·lícules fines -Espintrònica -Espectroscòpia de pèrdua d'energia d'electrons -Magnetic properties -Thin films -Spintronics -Electron energy loss spectroscopy |
Rights:
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(c) American Institute of Physics , 2008
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Document type:
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Article Article - Published version |
Published by:
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American Institute of Physics
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