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http://hdl.handle.net/2445/32274| 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 Espintrònica Espectroscòpia de pèrdua d'energia d'electrons Magnetic properties Thin films Spintronics 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. |
| Note: | Reproducció del document publicat a: http://dx.doi.org/10.1063/1.2981574 |
| It is part of: | Applied Physics Letters, 2008, vol. 93, num. 3, p. 112505-1-112505-3 |
| URI: | http://hdl.handle.net/2445/32274 |
| Related resource: | http://dx.doi.org/10.1063/1.2981574 |
| ISSN: | 0003-6951 |
| Appears in Collections: | Articles publicats en revistes (Enginyeria Electrònica i Biomèdica) |
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