Misfit relaxation of La₀.₇Sr₀.₃MnO₃ thin films by a nanodot segregation mechanism

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URI: https://hdl.handle.net/10902/34776
ISSN: 0003-6951
ISSN: 1077-3118
ISSN: 1520-8842
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Autoría
Abellán, Patricia; Moreno Sierra, CésarAutoridad Unican; Sandiumenge, F.; Obradors, X.; Casanove, M. J.
Fecha
2011
Derechos
© 2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Misfit relaxation of La0.7Sr0.3MnO3 thin films by a nanodot segregation mechanism. P. Abellán; C. Moreno; F. Sandiumenge; X. Obradors; M.-J. Casanove. Appl. Phys. Lett. 98, 041903 (2011) and may be found at https://doi.org/10.1063/1.3549182
Publicado en
Applied Physics Letters, 2011, 98(4), 041903
Editorial
American Institute of Physics
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Resumen/Abstract
Partially segregated La0.7Sr0.3MnO3 (LSMO) nanocomposite films are shown to exhibit a thickness dependent self-assembled structure. The morphological evolution of the nanocomposite and the misfit strain of the LSMO phase are linked through the topological distribution of La-Sr oxide nanodots within the film. Misfit relaxation occurs above a critical thickness, hc, coinciding with the nucleation of La-Sr oxide nanodots at the film-substrate interface. Below hc, the same dots outcrop the film surface, forming islands. As a consequence of this misfit relaxation mechanism, an enhancement in the magnetoresistance with increasing thickness is measured.
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