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Growth and magnetic properties of multiferroic LaxBi1-xMnO3 thin films
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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.
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GAJEK, M., et al. Growth and magnetic properties of multiferroic LaxBi1-xMnO3 thin films. Physical Review B. 2007. Vol. 75, num. núm, pags. 17. ISSN 0163-1829. [consulted: 18 of August of 2026]. Available at: https://hdl.handle.net/2445/10650