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Proceedings Paper

Enhanced transport properties in LaxMnO3-δ thin films grown on SrTiO3 substrates
Author(s): P. Orgiani; A. Galdi; C. Aruta; R. Ciancio; U. Lüders; R. V. K. Mangalam; W. Prellier; L. Maritato
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Paper Abstract

We report on structural, magnetic, and transport properties of LaxMnO3-δ thin films, epitaxially grown on SrTiO3 substrates by molecular beam epitaxy deposition technique. We varied the La/Mn ratio by changing the evaporation rate of the single-element diffusive cells. However, the oxygen content of LaxMnO3-δ thin films was varied by post-annealing them in air and/or vacuum, by changing the annealing temperature and the time of post-annealing process. Optimal oxygenated La0.88MnO3-δ (LMO) films show extremely high metal insulator transitions temperature TMI ~ 380K and magneto-transport similar to those found in strontium-doped La1-xSrxMnO3 manganites compounds. Magnetic measurements confirm the formation of a ferromagnetic phase at Curie temperature Tc of about 360K. All these findings clearly demonstrate that the lanthanum deficiency, with respect to bivalent cation-substitution, is a very efficient way to hole-dope manganites.

Paper Details

Date Published: 15 February 2010
PDF: 10 pages
Proc. SPIE 7603, Oxide-based Materials and Devices, 76030W (15 February 2010); doi: 10.1117/12.845080
Show Author Affiliations
P. Orgiani, CNR-INFM Coherentia (Italy)
Univ. of Salerno (Italy)
A. Galdi, CNR-INFM Coherentia (Italy)
Univ. of Salerno (Italy)
C. Aruta, CNR-INFM Coherentia (Italy)
Univ. of Napoli (Italy)
R. Ciancio, CNR-INFM National Lab. TASC (Italy)
U. Lüders, Lab. CRISMAT, ENSICAEN, CNRS (France)
R. V. K. Mangalam, Lab. CRISMAT, ENSICAEN, CNRS (France)
W. Prellier, Lab. CRISMAT, ENSICAEN, CNRS (France)
L. Maritato, CNR-INFM Coherentia (Italy)
Univ. of Salerno (Italy)

Published in SPIE Proceedings Vol. 7603:
Oxide-based Materials and Devices
Ferechteh Hosseini Teherani; David C. Look; Cole W. Litton; David J. Rogers, Editor(s)

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