Effect of the substrate ferroelastic transition on epitaxial La 0.7 Sr 0.3 MnO 3 films grown on LaAlO 3

A. Geddo Lehmann, C. Sanna, N. Lampis, F. Congiu, G. Concas, L. Maritato (), C. Aruta and A. Yu. Petrov

The European Physical Journal B: Condensed Matter and Complex Systems, 2007, vol. 55, issue 4, 337-345

Abstract: Thin films of La 0.7 Sr 0.3 MnO 3 were grown by molecular beam epitaxy on (001)LaAlO 3 crystals. High resolution X-ray diffraction analysis proves the presence of twins in the films at room temperature, showing that the twin structure of the substrate which forms at the $Pm\bar {3}m\to R\bar {3}c$ ferroelastic transition at T F =813 K served as a template for the film microstructure. Magnetic measurements indicate a thermomagnetic irreversibility which is ascribed to the quenched disorder related to twinning and discussed in terms of coexisting ferromagnetic and spin disordered regions connected with the undeformed domain cores and strained domain walls respectively. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

Keywords: 75.47.Gk Colossal magnetoresistance; 73.50.-h Electronic transport phenomena in thin films (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1140/epjb/e2007-00077-7

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