Gajek, M.Bibes, ManuelWyczisk, F.Varela Fernández, Manuel, 1956-Fontcuberta i Griñó, JosepBarthélémy, Agnès2009-12-292009-12-2920070163-1829https://hdl.handle.net/2445/10650A 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.7 p.application/pdfeng(c) The American Physical Society, 2007Pel·lícules finesPropietats magnètiquesMagnetic properties and materialsinfo:eu-repo/semantics/article549612info:eu-repo/semantics/openAccess