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Journal Article

Post annealing effect on transport properties of La0.67Ca0.33MnO3 films grown on vicinal cut substrates

MPS-Authors
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Yu,  L.
Scientific Facility Thin Film Technology (Gennady Logvenov), Max Planck Institute for Solid State Research, Max Planck Society;
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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Wang,  Y.
Department Nanoscale Science (Klaus Kern), Max Planck Institute for Solid State Research, Max Planck Society;

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Liu,  X.
Department Nanoscale Science (Klaus Kern), 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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Zhang,  P. X.
Scientific Facility Crystal Growth (Masahiko Isobe), 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;

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Citation

Yu, L., Wang, Y., Li, H. S., Liu, X., & Zhang, P. X. (2011). Post annealing effect on transport properties of La0.67Ca0.33MnO3 films grown on vicinal cut substrates. Journal of Alloys and Compounds, 509(37), 8991-8993.


Cite as: https://hdl.handle.net/21.11116/0000-000E-BE05-7
Abstract
La(0.67)Ca(0.33)MnO(3) thin films have been grown on 10 degrees, 15 degrees, and 20 degrees vicinal cut SrTiO(3) (100) substrates by pulse laser deposition. The single phase and the least textured growth have been studied by X-ray diffraction analysis. The post annealing effect with high temperature and high oxygen pressure on the transport properties of films has been investigated by resistance versus temperature measurements. Films with post annealing show large enhancement of metal-insulator transition temperature T(p) about 20-30 K towards higher temperature and obvious decrease of resistance, which is attributed to the refilling of oxygen, the change of Mn-O-Mn angle and the improvement of crystallinity by the post annealing effect. Specially, film on 20 degrees vicinal cut substrate exhibits the biggest range gap of peak resistance drop, which may originate from more defects caused by steps at this tilt angle and many of these defects are removed after post annealing. (C) 2011 Elsevier B. V. All rights reserved.