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Synthesis, Structures, and Physical Properties of Yttrium-Doped Strontium Manganese Oxide Films

Published online by Cambridge University Press:  01 February 2011

Andrew J. Francis  and
Paul A. Salvador
Andrew J. Francis
Affiliation:
Carnegie Mellon University, Department of Materials Science and Engineering, Pittsburgh, PA, 15213-3890
Paul A. Salvador
Affiliation:
Carnegie Mellon University, Department of Materials Science and Engineering, Pittsburgh, PA, 15213-3890
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Abstract

Cubic strontium manganese oxide is an end-member of the colossal magnetoresistive (CMR) family of manganese-based perovskites, Ln1-xAExMnO3. Because normal synthesis conditions lead to the 4-H hexagonal polymorph, high-pressure conditions are typically used to obtain the cubic perovskite polymorph. In this work, we describe the synthesis and structural/physical characterization of the cubic perovskite form of the high-alkaline-earth containing phases of Y1-xSrxMnO3 (x ≥ 0.7) as epitaxial thin films. Thin films of various stoichiometries were grown on single-crystal perovskite substrates SrTiO3, NdGaO3, and LaAlO3 using pulsed laser deposition. After optimizing deposition conditions, the perovskite polymorph is obtained using PLD at 800°C and 10-100 mTorr O2 for x=1, 0.9, 0.8, and 0.7, as demonstrated by x-ray diffraction. Epitaxial growth was determined to be cube-on-cube. Electrical property measurements demonstrated insulating behavior and no metal-insulator transition or magnetoresistive behavior, similar to related stable compounds.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 718: Symposium D – Perovskite Materials , 2002 , D9.4
Copyright
Copyright © Materials Research Society 2002

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