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Structural and electrical properties of La0.5Ca0.5MnO3 films deposited on differently oriented SrTiO3 substrates

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Aydogdu,  G. H.
Scientific Facility Thin Film Technology (Gennady Logvenov), Max Planck Institute for Solid State Research, Max Planck Society;
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Kuru,  Y.
Scientific Facility Thin Film Technology (Gennady Logvenov), Max Planck Institute for Solid State Research, Max Planck Society;

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Habermeier,  H.-U.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;
Scientific Facility Thin Film Technology (Gennady Logvenov), Max Planck Institute for Solid State Research, Max Planck Society;
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Aydogdu, G. H., Kuru, Y., & Habermeier, H.-U. (2007). Structural and electrical properties of La0.5Ca0.5MnO3 films deposited on differently oriented SrTiO3 substrates. Materials Science and Engineering B, 144(1-3 Sp. Iss. Sp. Iss. SI), 123-126.


Cite as: https://hdl.handle.net/21.11116/0000-000E-B621-F
Abstract
La0.5Ca0.5MnO3 (LCMO) films of various thicknesses were epitaxially grown on (10 0) and (111) oriented SrTiO3 (STO) substrates by pulsed laser deposition (PLID) technique. It was observed that LCMO films on (10 0) STO behave as an insulator. However, the films on (111) STO show a metal to insulator transition, when their thicknesses exceed 145 nm. Jahn-Teller strain (epsilon(J-T)) was seen to decrease with increasing film thickness for the films on (111) STO while the films on (100) STO have large compressive epsilon(J-T) values for all thicknesses. Moreover, rocking curves and asymmetries of the diffraction peaks for the films on (111) STO substrates may indicate the formation of a mosaic structure, which can act as a relaxation mechanism, with the increasing film thickness. These observations suggest that the electronic properties of the LCMO thin films can be modified by structural changes imposed by the substrate. (c) 2007 Elsevier B.V. All rights reserved.