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Growth and magnetic properties of multiferroic LaxBi1-xMnO3 thin films Gajek, M. Bibes, Manuel Wyczisk, F. Varela Fernández, Manuel, 1956- Fontcuberta i Griñó, Josep Barthélémy, Agnès Pel·lícules fines Propietats magnètiques Magnetic properties and materials A comparative study of LaxBi1-xMnO3 thin films grown on SrTiO3 substrates is reported. It is shown that these films grow epitaxially in a narrow pressure-temperature range. A detailed structural and compositional characterization of the films is performed within the growth window. The structure and the magnetization of this system are investigated. We find a clear correlation between the magnetization and the unit-cell volume that we ascribe to Bi deficiency and the resultant introduction of a mixed valence on the Mn ions. On these grounds, we show that the reduced magnetization of LaxBi1-xMnO3 thin films compared to the bulk can be explained quantitatively by a simple model, taking into account the deviation from nominal composition and the Goodenough-Kanamori-Anderson rules of magnetic interactions. 2009-12-29T11:21:27Z 2009-12-29T11:21:27Z 2007 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 0163-1829 https://hdl.handle.net/2445/10650 549612 eng Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.75.174417 Physical Review B, 2007, vol. 75 , núm, 17, p. 174417-1-174417-7 http://dx.doi.org/10.1103/PhysRevB.75.174417 (c) The American Physical Society, 2007 info:eu-repo/semantics/openAccess 7 p. application/pdf The American Physical Society Articles publicats en revistes (Física Aplicada)